توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

BENNETT GREG. (2007). CONSULTATIVE CLOSING: SIMPLE STEPS THAT BUILD RELATIONSHIPS AND WIN EVEN THE TOUGHEST SALE. AMERICAN MANAGEMENT ASSOCIATION.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

BENNETT GREG. CONSULTATIVE CLOSING: SIMPLE STEPS THAT BUILD RELATIONSHIPS AND WIN EVEN THE TOUGHEST SALE. NEW YORK: AMERICAN MANAGEMENT ASSOCIATION, 2007.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

BENNETT GREG. CONSULTATIVE CLOSING: SIMPLE STEPS THAT BUILD RELATIONSHIPS AND WIN EVEN THE TOUGHEST SALE. AMERICAN MANAGEMENT ASSOCIATION, 2007.