APA (7th ed.) Citation

Walton, O. F. (2004). Christie, the King's Servant A Sequel to "Christie's Old Organ". Project Gutenberg.

Chicago Style (17th ed.) Citation

Walton, O. F. Christie, the King's Servant A Sequel to "Christie's Old Organ". Project Gutenberg, 2004.

MLA (9th ed.) Citation

Walton, O. F. Christie, the King's Servant A Sequel to "Christie's Old Organ". Project Gutenberg, 2004.

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