APA(7版)引用形式

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

Chicagoスタイル(17版)引用形式

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

MLA(8版)引用形式

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