Dyfyniad APA

Hopkins, S. a. R. (1984). A recovery plan for marine turtles. National Marine Fisheries Service.

Dyfyniad Arddull Chicago

Hopkins, S.R. and Richardson. A Recovery Plan for Marine Turtles. Washington, D.C: National Marine Fisheries Service, 1984.

Dyfyniad MLA

Hopkins, S.R. and Richardson. A Recovery Plan for Marine Turtles. National Marine Fisheries Service, 1984.

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