Cita APA (7th ed.)

Yeung, A. K. (2006). Concepts and techniques of geographic information: Systems. Prentice Hall.

Cita Chicago (17th ed.)

Yeung, Albert K.W. Concepts and Techniques of Geographic Information: Systems. New Delhi: Prentice Hall, 2006.

Cita MLA (9th ed.)

Yeung, Albert K.W. Concepts and Techniques of Geographic Information: Systems. Prentice Hall, 2006.