APA (7th ed.) Citation

Weeks, J. M., Sachse, F., & Prager, C. M. (2009). Maya Daykeeping: Three Calendars From Highland Guatemala.

Chicago Style (17th ed.) Citation

Weeks, John M., Frauke Sachse, and Christian M. Prager. Maya Daykeeping: Three Calendars From Highland Guatemala. 2009.

MLA (9th ed.) Citation

Weeks, John M., et al. Maya Daykeeping: Three Calendars From Highland Guatemala. 2009.