APA (7th ed.) Citation

Longacre, S. A. (1970). Trilobites of the upper cambrian Ptychaspid Biomere Wilberns Formation, central Texas.

Chicago Style (17th ed.) Citation

Longacre, Susan A. Trilobites of the Upper Cambrian Ptychaspid Biomere Wilberns Formation, Central Texas. Tulsa, Okla, 1970.

MLA (9th ed.) Citation

Longacre, Susan A. Trilobites of the Upper Cambrian Ptychaspid Biomere Wilberns Formation, Central Texas. 1970.

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