APA (7th ed.) Citation

Betz, F., & Price, W. R. (1954). Learning German, a first book. American Book.

Chicago Style (17th ed.) Citation

Betz, Frederick, and William Raleigh Price. Learning German, a First Book. New York: American Book, 1954.

MLA (9th ed.) Citation

Betz, Frederick, and William Raleigh Price. Learning German, a First Book. American Book, 1954.