APA Citation

United States. Defense Mapping Agency. Hydrographic/Topographic Center, & Instituto Geográfico Nacional (El Salvador). (1977). El Salvador city maps 1: 15,000 (Ed. 2-DMA.). Washington, D.C.: DMA.

Chicago Style Citation

United States. Defense Mapping Agency. Hydrographic/Topographic Center, and Instituto Geográfico Nacional (El Salvador). El Salvador City Maps 1: 15,000. Ed. 2-DMA. Washington, D.C.: DMA, 1977.

MLA Citation

United States. Defense Mapping Agency. Hydrographic/Topographic Center, and Instituto Geográfico Nacional (El Salvador). El Salvador City Maps 1: 15,000. Ed. 2-DMA. Washington, D.C.: DMA, 1977.

Warning: These citations may not always be 100% accurate.