APA (7th ed.) Citation

Ruhrberg, K. (1962). Werner Gilles. Bongers.

Chicago Style (17th ed.) Citation

Ruhrberg, Karl. Werner Gilles. Recklinghausen: Bongers, 1962.

MLA (9th ed.) Citation

Ruhrberg, Karl. Werner Gilles. Bongers, 1962.

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