Cita APA (7th ed.)

Sinclair, U. (1949). Letters to Judd: An American workingman (New and rev. ed.). Haldeman-Julius.

Cita Chicago (17th ed.)

Sinclair, Upton. Letters to Judd: An American Workingman. New and rev. ed. Girard, Kan.: Haldeman-Julius, 1949.

Cita MLA (8th ed.)

Sinclair, Upton. Letters to Judd: An American Workingman. New and rev. ed. Haldeman-Julius, 1949.