APA
Underhill, . (1999). Why we buy. New York: Simon and Schuster.
Chicago
Underhill, . 1999. Why we buy. New York: Simon and Schuster.
Harvard
Underhill, . (1999). Why we buy. New York: Simon and Schuster.
MLA
Underhill, . Why we buy. New York: Simon and Schuster. 1999.