Dyfyniad APA

Firth, F. E. (1969). The Encyclopedia of marine resources. Van Nostrand reinhold company.

Dyfyniad Arddull Chicago

Firth, Frank E. The Encyclopedia of Marine Resources. London: Van Nostrand reinhold company, 1969.

Dyfyniad MLA

Firth, Frank E. The Encyclopedia of Marine Resources. Van Nostrand reinhold company, 1969.

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