APA (7th ed.) Citation

Kümmerly + Frey. (1969). Europe: Europa. [publisher not identified].

Chicago Style (17th ed.) Citation

Kümmerly + Frey. Europe: Europa. Bern: [publisher not identified], 1969.

MLA (9th ed.) Citation

Kümmerly + Frey. Europe: Europa. [publisher not identified], 1969.