Gentle Michael. (2002). CRM Project Management Handbook: Building realistic expectations and managing risk. Kongan Page Ltd.
Chicago-viite (17. p.)Gentle Michael. CRM Project Management Handbook: Building Realistic Expectations and Managing Risk. London: Kongan Page Ltd, 2002.
MLA-viite (9. p.)Gentle Michael. CRM Project Management Handbook: Building Realistic Expectations and Managing Risk. Kongan Page Ltd, 2002.
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