APA (7th ed.) Citation

Ruge, S., & Arstal, A. (1926). Norwegen. Velhagen & Klasing.

Chicago Style (17th ed.) Citation

Ruge, Sophus, and Aksel Arstal. Norwegen. Bielefeld [u.a.]: Velhagen & Klasing, 1926.

MLA (8th ed.) Citation

Ruge, Sophus, and Aksel Arstal. Norwegen. Velhagen & Klasing, 1926.