APA (7th ed.) Citation

U.S. Coast and Geodetic Survey. (1927). Progress of seismological investigations in U.S., Jan. 1, 1925 to June 30, 1927. GPO.

Chicago Style (17th ed.) Citation

U.S. Coast and Geodetic Survey. Progress of Seismological Investigations in U.S., Jan. 1, 1925 to June 30, 1927. [Washington]: GPO, 1927.

MLA (9th ed.) Citation

U.S. Coast and Geodetic Survey. Progress of Seismological Investigations in U.S., Jan. 1, 1925 to June 30, 1927. GPO, 1927.