Cita APA (7th ed.)

Arnold, J. I. 1. (1934). Problems in American life. Row.

Cita Chicago (17th ed.)

Arnold, Joseph Irvin 1887. Problems in American Life. Evanston, Ill., New York [etc.]: Row, 1934.

Cita MLA (9th ed.)

Arnold, Joseph Irvin 1887. Problems in American Life. Row, 1934.