APA (7th ed.) Citation

Evans, H. E. Observations on Aggregations of Males of Two Species of Beewolves (Hymenoptera: Sphecidae: Philanthus). Wiley.

Chicago Style (17th ed.) Citation

Evans, Howard E. Observations on Aggregations of Males of Two Species of Beewolves (Hymenoptera: Sphecidae: Philanthus). Wiley.

MLA (9th ed.) Citation

Evans, Howard E. Observations on Aggregations of Males of Two Species of Beewolves (Hymenoptera: Sphecidae: Philanthus). Wiley.

Warning: These citations may not always be 100% accurate.