Dyfyniad APA

(1949). SURVEY OF BIOLOGICAL PROGRESS. ACADEMIC PRESS.

Dyfyniad Arddull Chicago

SURVEY OF BIOLOGICAL PROGRESS. NEW YORK: ACADEMIC PRESS, 1949.

Dyfyniad MLA

SURVEY OF BIOLOGICAL PROGRESS. ACADEMIC PRESS, 1949.

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