Παραπομπή APA

 Clifford, C. (2013).  Let''s close a deal: Turn contacts into paying customers for your company, product, service or cause.  John Wiley & Sons.

Παραπομπή Chicago Style

 Clifford, Christine.  Let''s Close a Deal: Turn Contacts Into Paying Customers for Your Company, Product, Service or Cause.  John Wiley & Sons, 2013.

Παραπομπή MLA

 Clifford, Christine.  Let''s Close a Deal: Turn Contacts Into Paying Customers for Your Company, Product, Service or Cause.  John Wiley & Sons, 2013.

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