APA-referens

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

Chicago-stil citat

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

MLA-referens

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