APA (7th ed.) Citation

Keusen, H. B. Rudolf H. Strahm (ca. 1975).

Chicago Style (17th ed.) Citation

Keusen, Hans: Bern. Rudolf H. Strahm (ca. 1975).

MLA (8th ed.) Citation

Keusen, Hans: Bern. Rudolf H. Strahm (ca. 1975).

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