APA (7e ed.) Bronvermelding

Heywood, I. Introduction to Geographical Information Systems (4.). Pearson Education UK.

Chicago (17e ed.) Bronvermelding

Heywood, Ian;Cornelius. Introduction to Geographical Information Systems. 4. Pearson Education UK.

MLA (8e ed.) Bronvermelding

Heywood, Ian;Cornelius. Introduction to Geographical Information Systems. 4. Pearson Education UK.

Let op: Deze citaties zijn niet altijd 100% accuraat.