Cita APA

Weir, D., & Schapiro, M. (1981). Circle of poison: Pesticides and people in a hungry world. San Francisco, CA: Institute for Food and Development Policy.

Citación estilo Chicago

Weir, David, y Mark Schapiro. Circle of Poison: Pesticides and People in a Hungry World. San Francisco, CA: Institute for Food and Development Policy, 1981.

Cita MLA

Weir, David, y Mark Schapiro. Circle of Poison: Pesticides and People in a Hungry World. San Francisco, CA: Institute for Food and Development Policy, 1981.