Long, D. D., & Holle, M. C. (1997). Macro systems in the social environment. F.E. Peacock Publishers.
Cita Chicago (17th ed.)Long, Dennis D., i Marla C. Holle. Macro Systems in the Social Environment. Itasca, Ill: F.E. Peacock Publishers, 1997.
Cita MLA (9th ed.)Long, Dennis D., i Marla C. Holle. Macro Systems in the Social Environment. F.E. Peacock Publishers, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.