Style de citation APA

Legg, K. R., & Morrison, J. F. (1971). Politics and the International system, an Introduction. Harper& Ros.

Style de citation Chicago

Legg, Keith R., et James F. Morrison. Politics and the International System, an Introduction. New York: Harper& Ros, 1971.

Style de citation MLA

Legg, Keith R., et James F. Morrison. Politics and the International System, an Introduction. Harper& Ros, 1971.