APA (7th ed.) Citation

Unger, F., & Affeld, K. (1979). Assisted circulation. Springer-Verlag.

Chicago Style (17th ed.) Citation

Unger, Felix, and K. Affeld. Assisted Circulation. Berlin ; New York: Springer-Verlag, 1979.

MLA (9th ed.) Citation

Unger, Felix, and K. Affeld. Assisted Circulation. Springer-Verlag, 1979.