Cita APA (7a ed.)

Warwick, D. P., & Osherson, S. D. (1973). Comparative research methods. Prentice-Hall.

Cita Chicago Style (17a ed.)

Warwick, Donald P., y Samuel D. Osherson. Comparative Research Methods. Englewood Cliffs, N.J.: Prentice-Hall, 1973.

Cita MLA (8a ed.)

Warwick, Donald P., y Samuel D. Osherson. Comparative Research Methods. Prentice-Hall, 1973.