Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.