Cita APA

Purkitt, H. E. (1996). World politics 96/97. Dushkin Pub. Group.

Citación estilo Chicago

Purkitt, Helen E. World Politics 96/97. Guilford, Conn.: Dushkin Pub. Group, 1996.

Cita MLA

Purkitt, Helen E. World Politics 96/97. Dushkin Pub. Group, 1996.