APA (7th ed.) Citation

Messers, D., Coen, J. D., & Pike, S. (1970). What your coins are worth. Bantam.

Chicago Style (17th ed.) Citation

Messers, Daniel, Joel D. Coen, and Seymour Pike. What Your Coins Are Worth. [S.l.]: Bantam, 1970.

MLA (9th ed.) Citation

Messers, Daniel, et al. What Your Coins Are Worth. Bantam, 1970.