Παραπομπή σε μορφή APA (7η εκδ.)

Ryan, J. A. (1921). The Labor Problem, What It Is- How to Solve It. A Catechism on the Social Question. New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ryan, John A. The Labor Problem, What It Is- How to Solve It. A Catechism on the Social Question. New York, 1921.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ryan, John A. The Labor Problem, What It Is- How to Solve It. A Catechism on the Social Question. New York, 1921.