Soroka, M. P., & Bryjak, G. J. (1995). Social problems: A world at risk. Allyn and Bacon.
Cita Chicago (17th ed.)Soroka, Michael P., i George J. Bryjak. Social Problems: A World at Risk. Boston: Allyn and Bacon, 1995.
Cita MLA (9th ed.)Soroka, Michael P., i George J. Bryjak. Social Problems: A World at Risk. Allyn and Bacon, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.