ProQuest (Firm). (2001). Consulting services manual: A comprehensive guide to selection of consultants. World Bank.
Chicago-čujuhus (17. p.)ProQuest (Firm). Consulting Services Manual: A Comprehensive Guide to Selection of Consultants. Washington, DC: World Bank, 2001.
MLA-čujuhus (9. p.)ProQuest (Firm). Consulting Services Manual: A Comprehensive Guide to Selection of Consultants. World Bank, 2001.
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