APA (7th ed.) Citation

Geological Survey (U.S.). (1990). State of Arkansas: 1990. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). State of Arkansas: 1990. Reston, Va.: The Survey, 1990.

MLA (9th ed.) Citation

Geological Survey (U.S.). State of Arkansas: 1990. The Survey, 1990.

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