ebrary, Inc. (2004). Licensing geographic data and services. The National Academies Press.
Čikaški stil citiranja (17. izdanje)ebrary, Inc. Licensing Geographic Data and Services. Washington, D.C.: The National Academies Press, 2004.
MLA način citiranja (9. izdanje)ebrary, Inc. Licensing Geographic Data and Services. The National Academies Press, 2004.
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