National Fertilizer Development Centre (Pakistan). Planning and Development Division. (1992). Annual fertilizer review. National Fertilizer Development Centre, Planning and Development Division, Govt. of Pakistan.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Fertilizer Development Centre (Pakistan). Planning and Development Division. Annual Fertilizer Review. Islamabad: National Fertilizer Development Centre, Planning and Development Division, Govt. of Pakistan, 1992.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Fertilizer Development Centre (Pakistan). Planning and Development Division. Annual Fertilizer Review. National Fertilizer Development Centre, Planning and Development Division, Govt. of Pakistan, 1992.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.