APA
(1987). Distance Learning Systems and Structures : Training Manual. Bangkok: UNESCO Regional Office for Education in Asia and the Pacific.
Chicago
1987. Distance Learning Systems and Structures : Training Manual. Bangkok: UNESCO Regional Office for Education in Asia and the Pacific.
Harvard
(1987). Distance Learning Systems and Structures : Training Manual. Bangkok: UNESCO Regional Office for Education in Asia and the Pacific.
MLA
Distance Learning Systems and Structures : Training Manual. Bangkok: UNESCO Regional Office for Education in Asia and the Pacific. 1987.