Vago, S. (1996). Social change (3rd ed.). Prentice Hall.
Cita Chicago (17th ed.)Vago, Steven. Social Change. 3rd ed. Upper Saddle River, N. J: Prentice Hall, 1996.
Cita MLA (9th ed.)Vago, Steven. Social Change. 3rd ed. Prentice Hall, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.