APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1929). Geology of the De Queen and Caddo Gap quadrangles, Arkansas. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Geology of the De Queen and Caddo Gap Quadrangles, Arkansas. Washington: [publisher not identified], 1929.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Geology of the De Queen and Caddo Gap Quadrangles, Arkansas. [publisher not identified], 1929.

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