United States. National Imagery and Mapping Agency. (1998). Baltic Sea, Finland--south coast, approaches to Helsinki (7th ed., Oct. 17, 1998 (Correct through NM 42/98).). The Agency.
Chicago Style (17th ed.) CitationUnited States. National Imagery and Mapping Agency. Baltic Sea, Finland--south Coast, Approaches to Helsinki. 7th ed., Oct. 17, 1998 (Correct through NM 42/98). [Bethesda, Md.]: The Agency, 1998.
MLA (9th ed.) CitationUnited States. National Imagery and Mapping Agency. Baltic Sea, Finland--south Coast, Approaches to Helsinki. 7th ed., Oct. 17, 1998 (Correct through NM 42/98). The Agency, 1998.
Warning: These citations may not always be 100% accurate.