APA (7e ed.) Bronvermelding

Beckman, F. J. L., & Coughlin, C. E. (1939). Letter on labor and strikes. [C.E. Coughlin?].

Chicago (17e ed.) Bronvermelding

Beckman, Francis J. L., en Charles E. Coughlin. Letter on Labor and Strikes. Royal Oak, Mich.: [C.E. Coughlin?], 1939.

MLA (8e ed.) Bronvermelding

Beckman, Francis J. L., en Charles E. Coughlin. Letter on Labor and Strikes. [C.E. Coughlin?], 1939.