Dyfyniad APA

National Plant Food Institute (U.S.). (1955). Plant food review. National Plant Food Institute.

Dyfyniad Arddull Chicago

National Plant Food Institute (U.S.). Plant Food Review. Washington, D.C.: National Plant Food Institute, 1955.

Dyfyniad MLA

National Plant Food Institute (U.S.). Plant Food Review. National Plant Food Institute, 1955.

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