APA
Sparks H., . (1966). The amazing mail order business and how to succeed in it. New York: F. Fell.
Chicago
Sparks Howard, . 1966. The amazing mail order business and how to succeed in it. New York: F. Fell.
Harvard
Sparks H., . (1966). The amazing mail order business and how to succeed in it. New York: F. Fell.
MLA
Sparks Howard, . The amazing mail order business and how to succeed in it. New York: F. Fell. 1966.