APA (7th ed.) Citation

Smith, T. L., & Zopf, P. E. (1970). Demography: Principles and methods. Davis.

Chicago Style (17th ed.) Citation

Smith, Thomas Lynn, and Paul E. Zopf. Demography: Principles and Methods. Philadelphia: Davis, 1970.

MLA (9th ed.) Citation

Smith, Thomas Lynn, and Paul E. Zopf. Demography: Principles and Methods. Davis, 1970.