APA (7th ed.) Citation

Barbour, J., & Mackenzie, W. M. (2013). The Bruce. Project Gutenberg.

Chicago Style (17th ed.) Citation

Barbour, John, and W. M. Mackenzie. The Bruce. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Barbour, John, and W. M. Mackenzie. The Bruce. Project Gutenberg, 2013.

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