Dyfyniad APA

Roberts, H. F. (1929). Plant hybridization before mendal. Hafner Publishing Compnay.

Dyfyniad Arddull Chicago

Roberts, H F. Plant Hybridization Before Mendal. Newyork: Hafner Publishing Compnay, 1929.

Dyfyniad MLA

Roberts, H F. Plant Hybridization Before Mendal. Hafner Publishing Compnay, 1929.

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