Cita APA

Boyd, M. (1968). American civilization: An introduction to the social sciences. [S.l.].

Citación estilo Chicago

Boyd, Maurice. American Civilization: An Introduction to the Social Sciences. [S.l.], 1968.

Cita MLA

Boyd, Maurice. American Civilization: An Introduction to the Social Sciences. [S.l.], 1968.

Precaución: Estas citas no son 100% exactas.