Cita APA (7a ed.)

Adams, G. R., & Schvaneveldt, J. D. (1991). Understanding research methods (2nd ed.). Longman.

Cita Chicago Style (17a ed.)

Adams, Gerald R., y Jay D. Schvaneveldt. Understanding Research Methods. 2nd ed. New York [etc.]: Longman, 1991.

Cita MLA (9a ed.)

Adams, Gerald R., y Jay D. Schvaneveldt. Understanding Research Methods. 2nd ed. Longman, 1991.