Gaya APA
A Preface To Economic Geography. (1966).
Amerika:
Prentice-Hall.
Gaya Chicago
A Preface To Economic Geography.
.
Amerika:
Prentice-Hall,
1966.
.
Gaya MLA
A Preface To Economic Geography.
.
Amerika:
Prentice-Hall,
1966.
.
Gaya Turabian
A Preface To Economic Geography.
Amerika:
Prentice-Hall,
1966.
.