Dyfyniad APA

Canadian Wildlife Service, BC Environment. Wildlife Branch, Campbell, R. W., Rodriguez, I., Tyrrell, C., Chow, F. J., . . . Symons, M. H. (1997). The birds of British Columbia. UBC Press.

Dyfyniad Arddull Chicago

Canadian Wildlife Service, et al. The Birds of British Columbia. Vancouver, British Columbia: UBC Press, 1997.

Dyfyniad MLA

Canadian Wildlife Service, et al. The Birds of British Columbia. UBC Press, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.