توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Heyman, R. (1994). Why Didn't you say that in the first place?: : how to be understood at work. Jossey-Bass.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Heyman, Richard. Why Didn't You Say That in the First Place?: : How to Be Understood at Work. San Francisco: Jossey-Bass, 1994.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Heyman, Richard. Why Didn't You Say That in the First Place?: : How to Be Understood at Work. Jossey-Bass, 1994.