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Gujarati, D. N., Porter, D. C., & Gunasekar, S. (2012). Basic econometrics (5th ed.). New Delhi: Tata McGraw-Hill Education Private Limited.

Gujarati, Damodar N., Dawn C. Porter, and Sangeetha Gunasekar. Basic Econometrics. 5th ed. New Delhi: Tata McGraw-Hill Education Private Limited, 2012.

Gujarati, Damodar N., Dawn C. Porter, and Sangeetha Gunasekar. Basic Econometrics. 5th ed. New Delhi: Tata McGraw-Hill Education Private Limited, 2012.