.Lo, C. P., & .Yeung, A. K. W. (2007). Concepts and techniques of geographic information systems (2nd ed.). Pearson Prentice Hall.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি.Lo, C. P., এবং Albert K. W. .Yeung. Concepts and Techniques of Geographic Information Systems. 2nd ed. .Upper Saddle River, NJ: Pearson Prentice Hall, 2007.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি.Lo, C. P., এবং Albert K. W. .Yeung. Concepts and Techniques of Geographic Information Systems. 2nd ed. Pearson Prentice Hall, 2007.