Citazione Stile APA (7a Edizione)

Mreła, K., & Kostecki, M. J. (1981). Barriers and perspectives. The Polish Academy of Sciences. Institute of Philosophy and Sociology.

Citazione stile Chigago Style (17a edizione)

Mreła, Krzysztof, e Marian J. Kostecki. Barriers and Perspectives. Warszawa: The Polish Academy of Sciences. Institute of Philosophy and Sociology, 1981.

Citatione MLA (9a ed.)

Mreła, Krzysztof, e Marian J. Kostecki. Barriers and Perspectives. The Polish Academy of Sciences. Institute of Philosophy and Sociology, 1981.