Cofnodi Dyfyniadau
Dyfyniad APA
Canada. Environment Canada, ebrary, Inc, & Campbell, R. W. (1990). The birds of British Columbia. UBC Press.
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Dyfyniad Arddull Chicago
Canada. Environment Canada, Inc ebrary, and R. Wayne Campbell. The Birds of British Columbia. Vancouver: UBC Press, 1990.
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Dyfyniad MLA
Canada. Environment Canada, et al. The Birds of British Columbia. UBC Press, 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.