David Galer Kirkpatrick: The Facebook Effect, Simon & Schuster, New York 2010, s. 199
kb.se
libris.kb.se
Kirkpatrick, David (2010) (på engelska). The Facebook Effect: The Inside Story of the Company That Is Connecting the World (1st Simon & Schuster Hardcover Ed.). New York: Simon & Schuster. sid. 322. Libris12165636. ISBN 9781439102114