APA (7th ed.) Citation

MacGregor, M. E. M. (1990). The black-bearded barbarian. Project Gutenberg.

Chicago Style (17th ed.) Citation

MacGregor, Mary Esther Millier. The Black-bearded Barbarian. Champaign, Ill: Project Gutenberg, 1990.

MLA (9th ed.) Citation

MacGregor, Mary Esther Millier. The Black-bearded Barbarian. Project Gutenberg, 1990.

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