Dyfyniad APA

(1991). Fishing Vessel Sagety: Blueprint for a Nationa Program. National Academy of Sciences.

Dyfyniad Arddull Chicago

Fishing Vessel Sagety: Blueprint for a Nationa Program. Washington: National Academy of Sciences, 1991.

Dyfyniad MLA

Fishing Vessel Sagety: Blueprint for a Nationa Program. National Academy of Sciences, 1991.

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