APA (7th ed.) Citation

Unknown. (2007). Dame Duck's First Lecture on Education. Project Gutenberg.

Chicago Style (17th ed.) Citation

Unknown. Dame Duck's First Lecture on Education. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Unknown. Dame Duck's First Lecture on Education. Project Gutenberg, 2007.

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