Gaya APA
Avery, T, E., Berlin, G, L. (1985).
Interpretation of aerial photografis (4th).
United State of America:
BURGESS.
Gaya MLA
Avery, Thomas, Eugene., Berlin, Graydon, Lennis.
"Interpretation of aerial photografis".
4th
United State of America:
BURGESS,
1985.
Textbook.