APA (7th ed.) Citation

Pierce, R. (2008). Trapped in 'Black Russia': Letters June-November 1915. Project Gutenberg.

Chicago Style (17th ed.) Citation

Pierce, Ruth. Trapped in 'Black Russia': Letters June-November 1915. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Pierce, Ruth. Trapped in 'Black Russia': Letters June-November 1915. Project Gutenberg, 2008.

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