APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1916). Bulletin 633. Spirit leveling in Maine, 1899-1915. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 633. Spirit Leveling in Maine, 1899-1915. Washington: [publisher not identified], 1916.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 633. Spirit Leveling in Maine, 1899-1915. [publisher not identified], 1916.

Warning: These citations may not always be 100% accurate.