Cita APA

(1991). Geographical information systems: Principles and applications. Harlow, Essex, England: Longman Scientific & Technical.

Chicago Style Citation

Geographical Information Systems: Principles and Applications. Harlow, Essex, England: Longman Scientific & Technical, 1991.

Cita MLA

Geographical Information Systems: Principles and Applications. Harlow, Essex, England: Longman Scientific & Technical, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.