APA استشهاد

Cummins, E., & Devyver, F. T. (1947). Labour problem in the United States. N.van nustrand co.

استشهاد بنمط شيكاغو

Cummins, E.E, و Frank T. Devyver. Labour Problem in the United States. London: N.van nustrand co, 1947.

MLA استشهاد

Cummins, E.E, و Frank T. Devyver. Labour Problem in the United States. N.van nustrand co, 1947.