Clifford, C. (2013). Let's close a deal: Turn contacts into paying customers for your company, product, service or cause. Wiley.
Citace podle Chicago (17th ed.)Clifford, Christine. Let's Close a Deal: Turn Contacts into Paying Customers for Your Company, Product, Service or Cause. Hoboken, New Jersey: Wiley, 2013.
Citace podle MLA (8th ed.)Clifford, Christine. Let's Close a Deal: Turn Contacts into Paying Customers for Your Company, Product, Service or Cause. Wiley, 2013.
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