Style de citation APA (7e éd.)

Ryan, J. M. (1970). Area handbook for Nicaragua. U.S. Government Printing Office.

Style de citation Chicago (17e éd.)

Ryan, John Morris. Area Handbook for Nicaragua. Washington, D.C: U.S. Government Printing Office, 1970.

Style de citation MLA (9e éd.)

Ryan, John Morris. Area Handbook for Nicaragua. U.S. Government Printing Office, 1970.