Citazione APA

Colombo Plan Bureau, Goonetilleke, L. P., & Lee, B. H. (1971). Two decades of constructive effort: Anniversary volume.

Stile di citazione Chicago

Colombo Plan Bureau, L. P. Goonetilleke, e Byung Hak Lee. Two Decades of Constructive Effort: Anniversary Volume. Colombo, 1971.

Citazione MLA

Colombo Plan Bureau, et al. Two Decades of Constructive Effort: Anniversary Volume. 1971.