Epstein, J. B. (1984). Onesquethawan stratigraphy (Lower and Middle Devonian) of northeastern Pennsylvania. United States Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Epstein, Jack B. Onesquethawan Stratigraphy (Lower and Middle Devonian) of Northeastern Pennsylvania. Washington: United States Gov. Print. Off, 1984.
MLA-Zitierstil (9. Ausg.)Epstein, Jack B. Onesquethawan Stratigraphy (Lower and Middle Devonian) of Northeastern Pennsylvania. United States Gov. Print. Off, 1984.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.