Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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