MLA

Holmes, Chet. The Ultimate Sales Machine : Turbocharge Your Business with Relentless Focus On 12 Key Strategies. The penguin groupe: New York, 2007.

APA

Holmes, C. (2007). The ultimate sales machine : Turbocharge your business with relentless focus on 12 key strategies. The penguin groupe: New York.

Chicago

Holmes, Chet, The Ultimate Sales Machine: Turbocharge Your Business with Relentless Focus On 12 Key Strategies. The penguin groupe: New York, 2007.