APA-referens

Ruhland, W. (1965). Encyclopedia of plant physiology V.15. Springer Verlag.

Chicago-stil citat

Ruhland, W. Encyclopedia of Plant Physiology V.15. New York: Springer Verlag, 1965.

MLA-referens

Ruhland, W. Encyclopedia of Plant Physiology V.15. Springer Verlag, 1965.