توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Society of Chartered Property and Casualty Underwriters & Williams, N. A. (1986). Crisis avoidance: Insurance responsibilities. Society of Chartered Property and Casualty Underwriters.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Society of Chartered Property and Casualty Underwriters و Numan A. Williams. Crisis Avoidance: Insurance Responsibilities. Malvern, Pa.: Society of Chartered Property and Casualty Underwriters, 1986.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Society of Chartered Property and Casualty Underwriters و Numan A. Williams. Crisis Avoidance: Insurance Responsibilities. Society of Chartered Property and Casualty Underwriters, 1986.