APA (7th ed.) Citation

Frey, E., & Rappolt, H. (1986). An American apprenticeship: The letters of Emil Frey, 1860-1865. P. Lang.

Chicago Style (17th ed.) Citation

Frey, Emil, and Hedwig Rappolt. An American Apprenticeship: The Letters of Emil Frey, 1860-1865. New York: P. Lang, 1986.

MLA (8th ed.) Citation

Frey, Emil, and Hedwig Rappolt. An American Apprenticeship: The Letters of Emil Frey, 1860-1865. P. Lang, 1986.