APA (7th ed.) Citation

ProQuest (Firm). (1919). The Porto Rico earthquake of 1918 with descriptions of earlier earthquakes report of the Earthquake Investigation Commission. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). The Porto Rico Earthquake of 1918 with Descriptions of Earlier Earthquakes Report of the Earthquake Investigation Commission. Washington: [publisher not identified], 1919.

MLA (9th ed.) Citation

ProQuest (Firm). The Porto Rico Earthquake of 1918 with Descriptions of Earlier Earthquakes Report of the Earthquake Investigation Commission. [publisher not identified], 1919.

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