Dyfyniad APA

BIOTOL (Project), Open Universiteit (Heerlen, Netherlands), & University of Greenwich. (1994). Crop productivity. Butterworth-Heinemann.

Dyfyniad Arddull Chicago

BIOTOL (Project), Netherlands) Open Universiteit (Heerlen, and University of Greenwich. Crop Productivity. Oxford, Boston: Butterworth-Heinemann, 1994.

Dyfyniad MLA

BIOTOL (Project), et al. Crop Productivity. Butterworth-Heinemann, 1994.

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