International Geographical Union, International Cartogeaphic Association, & Joint Working Group on Environmental Atlases. (1980). Examples of environmental maps=. Instituto Geografico Nacional.
Chicago Style (17th ed.) CitationInternational Geographical Union, International Cartogeaphic Association, and Joint Working Group on Environmental Atlases. Examples of Environmental Maps=. Madrid: Instituto Geografico Nacional, 1980.
MLA (9th ed.) CitationInternational Geographical Union, et al. Examples of Environmental Maps=. Instituto Geografico Nacional, 1980.
Warning: These citations may not always be 100% accurate.