Gaya APA
Geography Regions and Concepts. (1988).
Canada:
John Wiley & Sons.
Gaya Chicago
Geography Regions and Concepts.
Ed.5.
Canada:
John Wiley & Sons,
1988.
.
Gaya MLA
Geography Regions and Concepts.
Ed.5.
Canada:
John Wiley & Sons,
1988.
.
Gaya Turabian
Geography Regions and Concepts.
Canada:
John Wiley & Sons,
1988.
.