APA (7th ed.) Citation

Avcin, M. J., Thompson, T. L., & Haley, B. R. (1979). The Mississippian and Pennsylvanian (Carboniferous) systems in the United States. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Avcin, Matthew J., Thomas L. Thompson, and Boyd R. Haley. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States. Washington: U.S. Govt. Print. Off, 1979.

MLA (9th ed.) Citation

Avcin, Matthew J., et al. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States. U.S. Govt. Print. Off, 1979.