APA (7th ed.) Citation

Barr, R. (2004). A Rock in the Baltic. Project Gutenberg.

Chicago Style (17th ed.) Citation

Barr, Robert. A Rock in the Baltic. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Barr, Robert. A Rock in the Baltic. Project Gutenberg, 2004.

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