Dyfyniad APA

MARSHALL, P. (1970). Biology Advanced Level Pt. Marshall. MacDonald & Evans.

Dyfyniad Arddull Chicago

MARSHALL, PT. Biology Advanced Level Pt. Marshall. MacDonald & Evans, 1970.

Dyfyniad MLA

MARSHALL, PT. Biology Advanced Level Pt. Marshall. MacDonald & Evans, 1970.

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