Cita APA

Pitman. L. M. & Buttress, F. (1997). Buttress's world guide to abbreviations of organizations (11th ed.). Blackie Academic & Professional.

Citación estilo Chicago

Pitman. L. M. and F. Buttress. Buttress's World Guide to Abbreviations of Organizations. 11th ed. London: Blackie Academic & Professional, 1997.

Cita MLA

Pitman. L. M. and F. Buttress. Buttress's World Guide to Abbreviations of Organizations. 11th ed. Blackie Academic & Professional, 1997.