APA (7th ed.) Citation

Koebel, W. H. (2006). South America. Project Gutenberg.

Chicago Style (17th ed.) Citation

Koebel, W. H. South America. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Koebel, W. H. South America. Project Gutenberg, 2006.

Warning: These citations may not always be 100% accurate.