Geological Survey (U.S.) & ProQuest (Firm). (1902). The geology and petrography of Crater Lake National Park. [publisher not identified].
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). The Geology and Petrography of Crater Lake National Park. Washington: [publisher not identified], 1902.
MLA (9th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). The Geology and Petrography of Crater Lake National Park. [publisher not identified], 1902.
Warning: These citations may not always be 100% accurate.