Dyfyniad APA

HOPSON, J. L. (1990). Study Guide To Accompany Essential Of Biology. McGraw-Hill.

Dyfyniad Arddull Chicago

HOPSON, Janet L. Study Guide To Accompany Essential Of Biology. McGraw-Hill, 1990.

Dyfyniad MLA

HOPSON, Janet L. Study Guide To Accompany Essential Of Biology. McGraw-Hill, 1990.

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