Παραπομπή σε μορφή APA (7η εκδ.)

International Labor Office & Marga Institute. (1979). The Informal sector of Colombo City, Sri Lanka: A study. Marga Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

International Labor Office και Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Colombo, Sri Lanka: Marga Institute, 1979.

Παραπομπή σε μορφή MLA (9th εκδ.)

International Labor Office και Marga Institute. The Informal Sector of Colombo City, Sri Lanka: A Study. Marga Institute, 1979.