Environmental Systems Research Institute. (1992). ArcWorld 1:3M: Continental coverage (Ed. 1, August 1, 1992.). Environmental Systems Research Institute.
Chicago Style (17th ed.) CitationEnvironmental Systems Research Institute. ArcWorld 1:3M: Continental Coverage. Ed. 1, August 1, 1992. Redlands, CA: Environmental Systems Research Institute, 1992.
MLA (8th ed.) CitationEnvironmental Systems Research Institute. ArcWorld 1:3M: Continental Coverage. Ed. 1, August 1, 1992. Environmental Systems Research Institute, 1992.
Warning: These citations may not always be 100% accurate.