Dyfyniad APA

Gulland. (1971). Fish resources of the ocean. Fishing News Books Ltd.

Dyfyniad Arddull Chicago

Gulland. Fish Resources of the Ocean. England: Fishing News Books Ltd, 1971.

Dyfyniad MLA

Gulland. Fish Resources of the Ocean. Fishing News Books Ltd, 1971.

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