National Engineering Services (Pakistan) Limited. NESPAK price index: Escalation of prices of construction industry inputs. National Engineering Services (Pakistan).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Engineering Services (Pakistan) Limited. NESPAK Price Index: Escalation of Prices of Construction Industry Inputs. Lahore, Pakistan: National Engineering Services (Pakistan).
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Engineering Services (Pakistan) Limited. NESPAK Price Index: Escalation of Prices of Construction Industry Inputs. National Engineering Services (Pakistan).
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.