Παραπομπή APA

Hopkins, T. K., & Wallerstein, I. (1982). World systems analysis: Theory and methodology. Sage publications.

Παραπομπή Chicago Style

Hopkins, Terence K., και Immanuel Wallerstein. World Systems Analysis: Theory and Methodology. London: Sage publications, 1982.

Παραπομπή MLA

Hopkins, Terence K., και Immanuel Wallerstein. World Systems Analysis: Theory and Methodology. Sage publications, 1982.