APA (7th ed.) Citation

Duff, C., & Stamford, P. (1960). German for beginners (2nd ed., rev.). Barnes & Noble.

Chicago Style (17th ed.) Citation

Duff, Charles, and Paul Stamford. German for Beginners. 2nd ed., rev. New York: Barnes & Noble, 1960.

MLA (9th ed.) Citation

Duff, Charles, and Paul Stamford. German for Beginners. 2nd ed., rev. Barnes & Noble, 1960.