APA
Cressman E. R., United States Geological Survey, . (1989). Reconnaissance stratigraphy of the Prichard Formation (Middle Proterozoic) and the early development of the Belt Basin, Washington, Idaho, and Montana. Washington, DC: US Gov. Print. Office.
Chicago
Cressman Earle Rupert, United States Geological Survey, . 1989. Reconnaissance stratigraphy of the Prichard Formation (Middle Proterozoic) and the early development of the Belt Basin, Washington, Idaho, and Montana. Washington, DC: US Gov. Print. Office.
Harvard
Cressman E. R., United States Geological Survey, . (1989). Reconnaissance stratigraphy of the Prichard Formation (Middle Proterozoic) and the early development of the Belt Basin, Washington, Idaho, and Montana. Washington, DC: US Gov. Print. Office.
MLA
Cressman Earle Rupert, United States Geological Survey, . Reconnaissance stratigraphy of the Prichard Formation (Middle Proterozoic) and the early development of the Belt Basin, Washington, Idaho, and Montana. Washington, DC: US Gov. Print. Office. 1989.