Cita APA (7a ed.)

Beins, B. C. (2019). Research Methods (4th.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.

Cita MLA (9a ed.)

Beins, Bernard C. Research Methods. 4th. Cambridge University Press, 2019.