APA (7th ed.) Citation

Pugh, A. L. (1998). Altitude of the top of the Sparta Sand and Memphis Sand in three areas of Arkansas. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Pugh, Aaron L. Altitude of the Top of the Sparta Sand and Memphis Sand in Three Areas of Arkansas. Little Rock, Arkansas: U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Pugh, Aaron L. Altitude of the Top of the Sparta Sand and Memphis Sand in Three Areas of Arkansas. U.S. Geological Survey, 1998.