Cita APA (7a ed.)

Heghin, M., & Thomas, F. O. (1937). Manual for Steps to citizenship. Works Progress Administration, Adult Education Project, University of Chicago.

Cita Chicago Style (17a ed.)

Heghin, Mary, y Frances O. Thomas. Manual for Steps to Citizenship. Chicago: Works Progress Administration, Adult Education Project, University of Chicago, 1937.

Cita MLA (8a ed.)

Heghin, Mary, y Frances O. Thomas. Manual for Steps to Citizenship. Works Progress Administration, Adult Education Project, University of Chicago, 1937.