Cita APA (7a ed.)

Kelly, J. M. (1987). How to check out your competition: A complete plan for innvestigating your market. John Wiley & sons.

Cita Chicago Style (17a ed.)

Kelly, John M. How to Check Out Your Competition: A Complete Plan for Innvestigating Your Market. New York [etc.]: John Wiley & sons, 1987.

Cita MLA (9a ed.)

Kelly, John M. How to Check Out Your Competition: A Complete Plan for Innvestigating Your Market. John Wiley & sons, 1987.