APA-viite

Heywood, V. H. (1976). Botanical systematics: An occassional series of monographs. Acadamic Press.

Chicago-tyylinen lähdeviittaus

Heywood, V H. Botanical Systematics: An Occassional Series of Monographs. London: Acadamic Press, 1976.

MLA-viite

Heywood, V H. Botanical Systematics: An Occassional Series of Monographs. Acadamic Press, 1976.