APA (7e ed.) Bronvermelding

The World Bank Group. (1990). Directory. Information, Technology and Facilities Dept., The World Bank.

Chicago (17e ed.) Bronvermelding

The World Bank Group. Directory. Washington: Information, Technology and Facilities Dept., The World Bank, 1990.

MLA (9e ed.) Bronvermelding

The World Bank Group. Directory. Information, Technology and Facilities Dept., The World Bank, 1990.