APA (7th ed.) Citation

Holmes, J. H. (2007). Heroes in Peace The 6th William Penn Lecture, May 9, 1920. Project Gutenberg.

Chicago Style (17th ed.) Citation

Holmes, John Haynes. Heroes in Peace The 6th William Penn Lecture, May 9, 1920. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Holmes, John Haynes. Heroes in Peace The 6th William Penn Lecture, May 9, 1920. Project Gutenberg, 2007.

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