APA (7th ed.) Citation

(1964). The preliminary determination of epicenters (PDE) bulletin. USGS.

Chicago Style (17th ed.) Citation

The Preliminary Determination of Epicenters (PDE) Bulletin. [Reston, Virginia]: USGS, 1964.

MLA (9th ed.) Citation

The Preliminary Determination of Epicenters (PDE) Bulletin. USGS, 1964.

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