APA (7th ed.) Citation

Duncan, R., Boughn, M., & Coleman, V. (2011). The H.D. Book.

Chicago Style (17th ed.) Citation

Duncan, Robert, Michael Boughn, and Victor Coleman. The H.D. Book. 2011.

MLA (9th ed.) Citation

Duncan, Robert, et al. The H.D. Book. 2011.

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