APA (7th ed.) Citation

(2008). The Encylopædia Britannica guide to the 100 most influential Americans. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The Encylopædia Britannica Guide to the 100 Most Influential Americans. [Chicago]: Encyclopaedia Britannica, 2008.

MLA (9th ed.) Citation

The Encylopædia Britannica Guide to the 100 Most Influential Americans. Encyclopaedia Britannica, 2008.

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