APA (7e ed.) Bronvermelding

Calderon, C., Loayza, N., & Serven, L. (2000). External sustainability: A stock equilibrium perspective. World Bank.

Chicago (17e ed.) Bronvermelding

Calderon, Cesar, Norman Loayza, en Luis Serven. External Sustainability: A Stock Equilibrium Perspective. Washington, D.C: World Bank, 2000.

MLA (9e ed.) Bronvermelding

Calderon, Cesar, et al. External Sustainability: A Stock Equilibrium Perspective. World Bank, 2000.