APA Citation

Parsley, R. L. (1981). Echinoderms from Middle and Upper Ordovician rocks of Kentucky. Washington: United States Department of the Interior, Geological Survey.

Chicago Style Citation

Parsley, Ronald L.. Echinoderms From Middle and Upper Ordovician Rocks of Kentucky. Washington: United States Department of the Interior, Geological Survey, 1981.

MLA Citation

Parsley, Ronald L.. Echinoderms From Middle and Upper Ordovician Rocks of Kentucky. Washington: United States Department of the Interior, Geological Survey, 1981.

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