United States. Soil Conservation Service. (1989). Q, which of these 4 areas is a wetland? USDA Soil Conservation Service.
Chicago Style (17th ed.) CitationUnited States. Soil Conservation Service. Q, Which of These 4 Areas Is a Wetland? St. Paul, Minn.: USDA Soil Conservation Service, 1989.
MLA (9th ed.) CitationUnited States. Soil Conservation Service. Q, Which of These 4 Areas Is a Wetland? USDA Soil Conservation Service, 1989.
Warning: These citations may not always be 100% accurate.