My attending surgeon flagged my systematic review draft for incorrect APA 7th edition formatting regarding multiple authors, so how should I handle sources with more than twenty contributors?

The short answer is that for sources with twenty-one or more authors, APA 7th edition requires you to list the first nineteen authors, insert an ellipsis, and then provide the name of the final author. You do not list every single contributor, nor do you use an ellipsis to replace the middle of the list if there are twenty or fewer names. This rule is specifically designed to keep bibliographies readable while still providing enough credit to the primary researchers and the lead investigator or last author. It is a common point of confusion because older versions of APA had different thresholds, and many students mistakenly assume that a massive list of names requires an ellipsis regardless of the count, or conversely, that they must include every name to be thorough. In reality, the format is quite rigid, and sticking to this nineteen-plus-one structure is exactly what editors are looking for to ensure consistency across the manuscript. When you are formatting these entries, keep in mind that the ellipsis should not be preceded by an ampersand, and there should be no extra spaces between the dots. It is easy to get tripped up when you are staring at a massive meta-analysis with forty contributors, but just count out the first nineteen, drop the rest, and append that final name. For example, if you are citing a massive multi-center study on surgical outcomes, you would list the first nineteen surgeons, add the three dots, and then end with the principal investigator’s name. This approach keeps your reference list from ballooning into an unmanageable length while still acknowledging the key players in the research. If you find yourself struggling with a source that has exactly twenty authors, remember that you must list all twenty of them without any ellipsis, as the truncation rule only kicks in once you hit twenty-one. The biggest trade-off here is balancing the precision of your bibliography with the readability of your paper. While it might feel like you are cutting out important contributors, you are actually following the standard protocol that professional journals expect. Double-check your reference management software if you are using one, as these tools often default to older citation styles or fail to automatically truncate correctly if the metadata is formatted poorly. It is worth manually verifying your most complex citations before your Friday deadline, as automated systems can sometimes miss the nuance of the nineteen-plus-one rule. If you have any sources that are particularly ambiguous or involve corporate authors rather than individuals, remember that those follow a completely different set of rules, so keep your reference manual handy for those edge cases. Taking the time to clean this up now will save you from a frustrating revision request later and ensure your submission looks polished and professional to your attending.