Dyfyniad APA

Canada. Fisheries and Marine Service & Hatfield, C. T. (1972). Fish resources of the Mackenzie river valley. Environment Canada, Fisheries Service.

Dyfyniad Arddull Chicago

Canada. Fisheries and Marine Service and C. T. Hatfield. Fish Resources of the Mackenzie River Valley. Winnipeg: Environment Canada, Fisheries Service, 1972.

Dyfyniad MLA

Canada. Fisheries and Marine Service and C. T. Hatfield. Fish Resources of the Mackenzie River Valley. Environment Canada, Fisheries Service, 1972.

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