- Author: Foreign Service Institute (U.S.)
- Language: English
- Year: 1961
- Author: Foreign Service Institute (U.S.), Earl W. Stevick (editor), Linda Hollander (editor)
- Language: English
- Year: 1965
- Author: Richard B. Noss
- Language: English
- Year: 1966
- Author: James A. Snow
- Language: English
- Year: 1971
- Author: Debebow Zelelie, Mulugeta Andualem, Serge Obolensky, United States. Foreign service institute.
- Language: English
- Year: 1965
- Author: Foreign Service Institute (U.S.)
- Language: English
- Year: 1989
- Author: Foreign Service Institute (U.S.)
- Language: English
- Year: 1967