Cita APA (7a ed.)

Nowak, S., & Lepa, M. O. (1977). Methodology of sociological research: General problems. PWN-Polish Scientific Publishers ; D. Reidel Publishing Company.

Cita Chicago Style (17a ed.)

Nowak, Stefan, y Maria Olga Lepa. Methodology of Sociological Research: General Problems. Warszawa : Dordrecht ; Boston: PWN-Polish Scientific Publishers ; D. Reidel Publishing Company, 1977.

Cita MLA (9a ed.)

Nowak, Stefan, y Maria Olga Lepa. Methodology of Sociological Research: General Problems. PWN-Polish Scientific Publishers ; D. Reidel Publishing Company, 1977.