APA (7th ed.) Citation

(2012). Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1 "Harmony" to "Heanor". Project Gutenberg.

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1 "Harmony" to "Heanor". Project Gutenberg, 2012.

MLA (9th ed.) Citation

Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1 "Harmony" to "Heanor". Project Gutenberg, 2012.

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