APA

Hoffman F. M., .Oxford expedition to the Serrania de Macuira, Colombia, 1975. : .

Chicago

Hoffman Forrest M, .Oxford expedition to the Serrania de Macuira, Colombia, 1975. : .

Harvard

Hoffman F. M., .Oxford expedition to the Serrania de Macuira, Colombia, 1975. : .

MLA

Hoffman Forrest M, .: . .