APA (7th ed.) Citation

Zangerl, R., & Richardson, E. S. (1963). The paleoecological history of two Pennsylvanian black shales. Field Museum of Natural History.

Chicago Style (17th ed.) Citation

Zangerl, Rainer, and Eugene S. Richardson. The Paleoecological History of Two Pennsylvanian Black Shales. Chicago, Ill: Field Museum of Natural History, 1963.

MLA (9th ed.) Citation

Zangerl, Rainer, and Eugene S. Richardson. The Paleoecological History of Two Pennsylvanian Black Shales. Field Museum of Natural History, 1963.