APA
Colwell, R. K. (1994). Potential ecological and evolutionary problems of introducing transgenic crops into the environment. Biosafety for Sustainable Agriculture: Sharing Biotechnology Regulatory Experiences of the Western Hemisphere. Eds. Krattiger, AF \& Rosemarin A. ISAAA, Ithaca \& SEI, Stockholm, 33–46.
Chicago/Turabian
Colwell, Robert K. “Potential Ecological and Evolutionary Problems of Introducing Transgenic Crops into the Environment.” biosafety for sustainable agriculture: Sharing biotechnology regulatory experiences of the western hemisphere. Eds. Krattiger, AF \& Rosemarin A. ISAAA, Ithaca \& SEI, Stockholm (1994): 33–46.
MLA
Colwell, Robert K. “Potential Ecological and Evolutionary Problems of Introducing Transgenic Crops into the Environment.” Biosafety for Sustainable Agriculture: Sharing Biotechnology Regulatory Experiences of the Western Hemisphere. Eds. Krattiger, AF \& Rosemarin A. ISAAA, Ithaca \& SEI, Stockholm, 1994, pp. 33–46.