APA (7th ed.) Citation

Brown, D., Walker, C., & Fermor, J. (1999). The Water Clock in Mesopotamia.

Chicago Style (17th ed.) Citation

Brown, David, Christopher Walker, and John Fermor. The Water Clock in Mesopotamia. 1999.

MLA (8th ed.) Citation

Brown, David, et al. The Water Clock in Mesopotamia. 1999.