Gaya APA
Heywood, Ian, Cornelius, Sarah. (2002).
An Introduction to geographical information systems (2e).
London:
Pearson Education.
Gaya Chicago
Heywood, Ian, Cornelius, Sarah.
An Introduction to geographical information systems.
2e
London:
Pearson Education,
2002.
Buku.
Gaya MLA
Heywood, Ian, Cornelius, Sarah.
An Introduction to geographical information systems.
2e
London:
Pearson Education,
2002.
Buku.
Gaya Turabian
Heywood, Ian, Cornelius, Sarah.
An Introduction to geographical information systems.
2e
London:
Pearson Education,
2002.
Buku.