Cita APA (7th ed.)

Colombo Plan Bureau. (1961). The Colombo plan story: 10 years of progress, 1951-1961. s.n.

Cita Chicago (17th ed.)

Colombo Plan Bureau. The Colombo Plan Story: 10 Years of Progress, 1951-1961. [Colombo: s.n, 1961.

Cita MLA (9th ed.)

Colombo Plan Bureau. The Colombo Plan Story: 10 Years of Progress, 1951-1961. s.n, 1961.