Cita APA (7a ed.)

Patton, M. Q. (1990). Practical evaluation ([7th ed.].). Sage.

Cita Chicago Style (17a ed.)

Patton, Michael Quinn. Practical Evaluation. [7th ed.]. Newbury Park, Calif: Sage, 1990.

Cita MLA (9a ed.)

Patton, Michael Quinn. Practical Evaluation. [7th ed.]. Sage, 1990.