APA (7th ed.) Citation

Hawkins, J., Hughes, C., & Scotland, R. (1997). Primary homology assessment, characters and character states.

Chicago Style (17th ed.) Citation

Hawkins, J., C. Hughes, and R. Scotland. Primary Homology Assessment, Characters and Character States. 1997.

MLA (9th ed.) Citation

Hawkins, J., et al. Primary Homology Assessment, Characters and Character States. 1997.