Dyfyniad APA

(1975). Department of Trade Ship Captian's medical guide (20th ed.). HMSO.

Dyfyniad Arddull Chicago

Department of Trade Ship Captian's Medical Guide. 20th ed. London: HMSO, 1975.

Dyfyniad MLA

Department of Trade Ship Captian's Medical Guide. 20th ed. HMSO, 1975.

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