APA (7th ed.) Citation

Buff, M. M., & Buff, C. (1939). Kobi: A boy of Switzerland. Viking Pr.

Chicago Style (17th ed.) Citation

Buff, Mary Marsh, and Conrad Buff. Kobi: A Boy of Switzerland. New York: Viking Pr, 1939.

MLA (9th ed.) Citation

Buff, Mary Marsh, and Conrad Buff. Kobi: A Boy of Switzerland. Viking Pr, 1939.