APA (7th ed.) Citation

(2001). Book sales on the internet ([2nd ed.].). Bookseller Pubs..

Chicago Style (17th ed.) Citation

Book Sales on the Internet. [2nd ed.]. London: Bookseller Pubs., 2001.

MLA (9th ed.) Citation

Book Sales on the Internet. [2nd ed.]. Bookseller Pubs., 2001.

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