APA (7th ed.) Citation

Penck, W. (1912). Studien am Kilauea (Hawaii). [publisher not identified].

Chicago Style (17th ed.) Citation

Penck, Walther. Studien Am Kilauea (Hawaii). [Berlin]: [publisher not identified], 1912.

MLA (9th ed.) Citation

Penck, Walther. Studien Am Kilauea (Hawaii). [publisher not identified], 1912.