Cita APA (7a ed.)

(1977). Birds protected in Canada under the Migratory Birds Convention Act. Canadian widlife service.

Cita Chicago Style (17a ed.)

Birds Protected in Canada Under the Migratory Birds Convention Act. Ottawa: Canadian widlife service, 1977.

Cita MLA (9a ed.)

Birds Protected in Canada Under the Migratory Birds Convention Act. Canadian widlife service, 1977.