APA (7e ed.) Bronvermelding

Callen, T., Cherif, R., Hasanov, F., & Hegazy, A. (2014). Economic Diversification in the GCC: Past, Present, and Future. International Monetary Fund.

Chicago (17e ed.) Bronvermelding

Callen, Tim, Reda Cherif, Fuad Hasanov, en Amgad Hegazy. Economic Diversification in the GCC: Past, Present, and Future. Washington, D.C.: International Monetary Fund, 2014.

MLA (8e ed.) Bronvermelding

Callen, Tim, et al. Economic Diversification in the GCC: Past, Present, and Future. International Monetary Fund, 2014.