APA (7th ed.) Citation

Gray, W. H. (2012). A History of Oregon, 1792-1849 Drawn From Personal Observation and Authentic Information. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gray, William Henry. A History of Oregon, 1792-1849 Drawn From Personal Observation and Authentic Information. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Gray, William Henry. A History of Oregon, 1792-1849 Drawn From Personal Observation and Authentic Information. Project Gutenberg, 2012.

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