Citazione Stile APA (7a Edizione)
Weir, D., & Schapiro, M. (1981). Circle of poison: Pesticides and people in a hungry world. Institute for Food and Development Policy.
Citazione stile Chigago Style (17a edizione)
Weir, David, e Mark Schapiro. Circle of Poison: Pesticides and People in a Hungry World. San Francisco, CA: Institute for Food and Development Policy, 1981.
Citatione MLA (9a ed.)
Weir, David, e Mark Schapiro. Circle of Poison: Pesticides and People in a Hungry World. Institute for Food and Development Policy, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.