APA引文

SIMS, J. A., & JOHNSON, L. E. (1972). Animals in the American economy. The Iowa State University.

Chicago Style (17th ed.) Citation

SIMS, John A., and Leslie E. JOHNSON. Animals in the American Economy. Iowa: The Iowa State University, 1972.

MLA引文

SIMS, John A., and Leslie E. JOHNSON. Animals in the American Economy. The Iowa State University, 1972.