Cita APA

Swartz, W. G. (1961). American governmental problems (2d ed.). Van Nostrand.

Citación estilo Chicago

Swartz, Willis G. American Governmental Problems. 2d ed. Princeton, N. J: Van Nostrand, 1961.

Cita MLA

Swartz, Willis G. American Governmental Problems. 2d ed. Van Nostrand, 1961.