Cita APA (7th ed.)

Cohen, L., & Manion, L. (1980). Research methods in education (3rd ed.). Routledge.

Cita Chicago (17th ed.)

Cohen, Louis, i Lawrence Manion. Research Methods in Education. 3rd ed. London: Routledge, 1980.

Cita MLA (9th ed.)

Cohen, Louis, i Lawrence Manion. Research Methods in Education. 3rd ed. Routledge, 1980.