APA (7th ed.) Citation

(2012). Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba". Project Gutenberg.

Chicago Style (17th ed.) Citation

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba". Project Gutenberg, 2012.

MLA (9th ed.) Citation

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba". Project Gutenberg, 2012.

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