APA
SIMPSON CRAIG, I. KENNEDY DAN S, . (2014). THE DIRECT MAIL SOLUTION. USA: ENTREPRENEUR PRESS.
Chicago
SIMPSON CRAIG, I. KENNEDY DAN S, . 2014. THE DIRECT MAIL SOLUTION. USA: ENTREPRENEUR PRESS.
Harvard
SIMPSON CRAIG, I. KENNEDY DAN S, . (2014). THE DIRECT MAIL SOLUTION. USA: ENTREPRENEUR PRESS.
MLA
SIMPSON CRAIG, I. KENNEDY DAN S, . THE DIRECT MAIL SOLUTION. USA: ENTREPRENEUR PRESS. 2014.