APA
Hagen Victor Wolfgang Von, . (1951). South America : The Green World of the Naturalists : Five Centuries of Natural History in South America. LONDON: EYRE & SPOTTISWOODE.
Chicago
Hagen Victor Wolfgang Von, . 1951. South America : The Green World of the Naturalists : Five Centuries of Natural History in South America. LONDON: EYRE & SPOTTISWOODE.
Harvard
Hagen Victor Wolfgang Von, . (1951). South America : The Green World of the Naturalists : Five Centuries of Natural History in South America. LONDON: EYRE & SPOTTISWOODE.
MLA
Hagen Victor Wolfgang Von, . South America : The Green World of the Naturalists : Five Centuries of Natural History in South America. LONDON: EYRE & SPOTTISWOODE. 1951.