Παραπομπή σε μορφή APA (7η εκδ.)

Hansen, G. (1895). The orchid hybrids: Enumeration and classification of all hybrids of orchids published up to October 15, 1895. Dulau.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hansen, Geo. The Orchid Hybrids: Enumeration and Classification of All Hybrids of Orchids Published Up to October 15, 1895. London: Dulau, 1895.

Παραπομπή σε μορφή MLA (8th εκδ.)

Hansen, Geo. The Orchid Hybrids: Enumeration and Classification of All Hybrids of Orchids Published Up to October 15, 1895. Dulau, 1895.