Gaya APA
Industrial Activity and Econimic Geography. (1961).
Amerika:
Hutchinson & Co.
Gaya Chicago
Industrial Activity and Econimic Geography.
.
Amerika:
Hutchinson & Co,
1961.
.
Gaya MLA
Industrial Activity and Econimic Geography.
.
Amerika:
Hutchinson & Co,
1961.
.
Gaya Turabian
Industrial Activity and Econimic Geography.
Amerika:
Hutchinson & Co,
1961.
.