Ceder, B., & Quashem, M. A. (1998). Study on group sustainability. BRDB Institutional Support Project.
Chicago Style aipamenaCeder, Bjorn, and M. A. Quashem. Study on Group Sustainability. Dhaka: BRDB Institutional Support Project, 1998.
MLA aipamenaCeder, Bjorn, and M. A. Quashem. Study on Group Sustainability. BRDB Institutional Support Project, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.