APA (7th ed.) Citation

Black, H. C. (2012). Notable Women Authors of the Day Biographical Sketches. Project Gutenberg.

Chicago Style (17th ed.) Citation

Black, Helen C. Notable Women Authors of the Day Biographical Sketches. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Black, Helen C. Notable Women Authors of the Day Biographical Sketches. Project Gutenberg, 2012.

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