APA (7th ed.) Citation

Wheeler, J. D. (2012). Billie Bradley and Her Classmates The Secret of the Locked Tower. Project Gutenberg.

Chicago Style (17th ed.) Citation

Wheeler, Janet D. Billie Bradley and Her Classmates The Secret of the Locked Tower. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Wheeler, Janet D. Billie Bradley and Her Classmates The Secret of the Locked Tower. Project Gutenberg, 2012.

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