APA (7 ম সংস্করণ) উদ্ধৃতি

Schiffman, S. (2008). The 25 sales skills they don`t teach at business school. massachusetts Adams Media Corp.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Schiffman, Stephan. The 25 Sales Skills They Don`t Teach at Business School. [s.l]: massachusetts Adams Media Corp, 2008.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Schiffman, Stephan. The 25 Sales Skills They Don`t Teach at Business School. massachusetts Adams Media Corp, 2008.