APA (7th ed.) Citation

Lübbert, C. H., & Welters, H. (1961). Heimatatlas Köln. [Harms].

Chicago Style (17th ed.) Citation

Lübbert, C. H., and Hans Welters. Heimatatlas Köln. [Köln]: [Harms], 1961.

MLA (8th ed.) Citation

Lübbert, C. H., and Hans Welters. Heimatatlas Köln. [Harms], 1961.

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