توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Choudhry, N. A. (1979). Customs rules and notifications: Part IX rules and notifications, 1978 with sales tax rates, exemptions and rebates [as amended upto 25th July, 1979]. Tariq Najib Corp..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Choudhry, Najib A. Customs Rules and Notifications: Part IX Rules and Notifications, 1978 with Sales Tax Rates, Exemptions and Rebates [as Amended Upto 25th July, 1979]. Lahore: Tariq Najib Corp., 1979.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Choudhry, Najib A. Customs Rules and Notifications: Part IX Rules and Notifications, 1978 with Sales Tax Rates, Exemptions and Rebates [as Amended Upto 25th July, 1979]. Tariq Najib Corp., 1979.