Colombo Plan Bureau, Goonetilleke, L. P., & Lee, B. H. (1971). Two decades of constructive effort: Anniversary volume.
Dyfyniad Arddull ChicagoColombo Plan Bureau, L. P. Goonetilleke, and Byung Hak Lee. Two Decades of Constructive Effort: Anniversary Volume. Colombo, 1971.
Dyfyniad MLAColombo Plan Bureau, et al. Two Decades of Constructive Effort: Anniversary Volume. 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.