Cita APA

Nilsson, G. (1990). Importation of birds into the Unites States 1986-1988. Washington, D. C.: Animal Welfare Institute.

Citación estilo Chicago

Nilsson, Greta. Importation of Birds Into the Unites States 1986-1988. Washington, D. C.: Animal Welfare Institute, 1990.

Cita MLA

Nilsson, Greta. Importation of Birds Into the Unites States 1986-1988. Washington, D. C.: Animal Welfare Institute, 1990.