APA (7th ed.) Citation

Maddin, R., Wheeler, T. S., & Muhly, J. D. (1977). How the Iron Age Began.

Chicago Style (17th ed.) Citation

Maddin, Robert, Tamara Stech Wheeler, and James D. Muhly. How the Iron Age Began. 1977.

MLA (8th ed.) Citation

Maddin, Robert, et al. How the Iron Age Began. 1977.