APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1921). Bulletin 704 Geology of the igneous rocks of Essex County, Massachusetts. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 704 Geology of the Igneous Rocks of Essex County, Massachusetts. Washington: [publisher not identified], 1921.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Bulletin 704 Geology of the Igneous Rocks of Essex County, Massachusetts. [publisher not identified], 1921.

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