APA-viite

Heywood, V. H. (1971). biology and chemistry of Umbelliferae. Academic Press.

Chicago-tyylinen lähdeviittaus

Heywood, V H. Biology and Chemistry of Umbelliferae. London: Academic Press, 1971.

MLA-viite

Heywood, V H. Biology and Chemistry of Umbelliferae. Academic Press, 1971.