APA (7th ed.) Citation

Kümmerly + Frey. (1986). North America. Kümmerly + Frey.

Chicago Style (17th ed.) Citation

Kümmerly + Frey. North America. Bern: Kümmerly + Frey, 1986.

MLA (9th ed.) Citation

Kümmerly + Frey. North America. Kümmerly + Frey, 1986.

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