Colombo Plan Bureau. (1976). The Colombo Plan, 1951-1976: Vision into reality. [Information Dept., Colombo Plan Bureau].
Chicago-referens (17:e uppl.)Colombo Plan Bureau. The Colombo Plan, 1951-1976: Vision into Reality. [Colombo]: [Information Dept., Colombo Plan Bureau], 1976.
MLA-referens (8:e uppl.)Colombo Plan Bureau. The Colombo Plan, 1951-1976: Vision into Reality. [Information Dept., Colombo Plan Bureau], 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.