APA (7th ed.) Citation

Kümmerly + Frey. (1975). South America. [publisher not identified].

Chicago Style (17th ed.) Citation

Kümmerly + Frey. South America. Berne: [publisher not identified], 1975.

MLA (9th ed.) Citation

Kümmerly + Frey. South America. [publisher not identified], 1975.

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