Cita APA

Langelier, K., Tolksdorf, M., Herunter, S., Campbell, R., & Lewis, R. (1990). British Columbia. Poisoning by lead shot in trumpeter swans.

Chicago Style Citation

Langelier, Kenl, Monika Tolksdorf, Susan Herunter, Robin Campbell, i Ron Lewis. British Columbia. Poisoning By Lead Shot in Trumpeter Swans. 1990.

Cita MLA

Langelier, Kenl, et al. British Columbia. Poisoning By Lead Shot in Trumpeter Swans. 1990.