APA (7th ed.) Citation

Parsley, R. L. (1981). Echinoderms from Middle and Upper Ordovician rocks of Kentucky: Descriptions and illustrations of nine species of Stylophora, Paracrinoidea, Inadunata, Cyclocystoidea, and Rhombifera. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Parsley, Ronald L. Echinoderms from Middle and Upper Ordovician Rocks of Kentucky: Descriptions and Illustrations of Nine Species of Stylophora, Paracrinoidea, Inadunata, Cyclocystoidea, and Rhombifera. Washington, D.C.: U.S. Dept. of the Interior, Geological Survey, 1981.

MLA (9th ed.) Citation

Parsley, Ronald L. Echinoderms from Middle and Upper Ordovician Rocks of Kentucky: Descriptions and Illustrations of Nine Species of Stylophora, Paracrinoidea, Inadunata, Cyclocystoidea, and Rhombifera. U.S. Dept. of the Interior, Geological Survey, 1981.