Dyfyniad APA

Lo, C. P., & Yeung, A. K. W. (2005). Concepts and techniques of geographic information systems. Prentice-Hall of India.

Dyfyniad Arddull Chicago

Lo, C. P., and Albert K. W. Yeung. Concepts and Techniques of Geographic Information Systems. New Delhi: Prentice-Hall of India, 2005.

Dyfyniad MLA

Lo, C. P., and Albert K. W. Yeung. Concepts and Techniques of Geographic Information Systems. Prentice-Hall of India, 2005.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.