APA (7th ed.) Citation

Keefe, E. K. (1974). Area handbook for Bulgaria. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Keefe, Eugene K. Area Handbook for Bulgaria. Washington, D.C: U.S. Government Printing Office, 1974.

MLA (9th ed.) Citation

Keefe, Eugene K. Area Handbook for Bulgaria. U.S. Government Printing Office, 1974.