Gaya APA
BLIJ, H, J, D.
(1971).
GEOGRAPHY : REGION AND CONCEPTS
.
United State of America:
John Wiley & Sons. Inc.
Gaya MLA
BLIJ, HARM, J., De.
"GEOGRAPHY : REGION AND CONCEPTS".
United State of America:
John Wiley & Sons. Inc,
1971.
Textbook.