APA

Fittkau E. J., Illies J., Klinge H., Schwabe G. H. & Sioli H. (1968). Biogeography and ecology in South America. The Hague: W. Junk.

Chicago

Fittkau E J, Illies J, Klinge H, Schwabe G H and Sioli H. 1968. Biogeography and ecology in South America. The Hague: W. Junk.

Harvard

Fittkau E. J., Illies J., Klinge H., Schwabe G. H. and Sioli H. (1968). Biogeography and ecology in South America. The Hague: W. Junk.

MLA

Fittkau E J, Illies J, Klinge H, Schwabe G H and Sioli H. Biogeography and ecology in South America. The Hague: W. Junk. 1968.