APA (7th ed.) Citation

Krog, H., & Swinscow, T. (1981). Parmelia subgenus Amphigymnia(lichens) in East Africa. British Museum (Natural History).

Chicago Style (17th ed.) Citation

Krog, Hildur, and T.D.V Swinscow. Parmelia Subgenus Amphigymnia(lichens) in East Africa. London: British Museum (Natural History), 1981.

MLA (9th ed.) Citation

Krog, Hildur, and T.D.V Swinscow. Parmelia Subgenus Amphigymnia(lichens) in East Africa. British Museum (Natural History), 1981.