The enigma of the mind /
by Robert Campbell and the editors of Time-Life Books.

APA Citation

Campbell, R., Time-Life Books. (1976). The enigma of the mind. New York: Time-Life Books.

MLA Citation

Campbell, Robert, 1922-, and Time-Life Books. The Enigma of the Mind. New York: Time-Life Books, 1976.

Warning: These citations may not always be complete (especially for serials).