Documentation of the UN system :
a survey of bibliographic control and a suggested methodology for an integrated UN bibliography /
prepared by John Clews for the IFLA International Office for UBC.

APA Citation

Clews, J., IFLA International Office for UBC. (1981). Documentation of the UN system: a survey of bibliographic control and a suggested methodology for an integrated UN bibliography. London: IFLA International Office for UBC.

MLA Citation

Clews, John, and IFLA International Office for UBC. Documentation of the UN System: a Survey of Bibliographic Control And a Suggested Methodology for an Integrated UN Bibliography. London: IFLA International Office for UBC, 1981.

Warning: These citations may not always be complete (especially for serials).