Cita APA (7th ed.)

Walther, G. (1993). Niebuhrs Forschung: Gerrit Walther. Steiner.

Cita Chicago (17th ed.)

Walther, Gerrit. Niebuhrs Forschung: Gerrit Walther. Stuttgart: Steiner, 1993.

Cita MLA (8th ed.)

Walther, Gerrit. Niebuhrs Forschung: Gerrit Walther. Steiner, 1993.