Wisconsin Geological and Natural History Survey, Smith, L. S., & Trippe, H. M. (1899). Hydrographic map of Elkhart Lake, Sheboygan Co. Wis. [The Survey].
Chicago Style (17th ed.) CitationWisconsin Geological and Natural History Survey, Leonard S. Smith, and H. M. Trippe. Hydrographic Map of Elkhart Lake, Sheboygan Co. Wis. [Madison, Wis.]: [The Survey], 1899.
MLA (9th ed.) CitationWisconsin Geological and Natural History Survey, et al. Hydrographic Map of Elkhart Lake, Sheboygan Co. Wis. [The Survey], 1899.
Warning: These citations may not always be 100% accurate.