APA (7th ed.) Citation

Krog, H., & Swinscow, T. D. V. (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.