Roberts, H. F. (1929). Plant hybridization before mendal. Hafner Publishing Compnay.
Chicago Style citaatRoberts, H F. Plant Hybridization Before Mendal. Newyork: Hafner Publishing Compnay, 1929.
MLA citatieRoberts, H F. Plant Hybridization Before Mendal. Hafner Publishing Compnay, 1929.
Let op: Deze citaties zijn niet altijd 100% accuraat.