Gaya APA
BENGSTON,Nels A.. (1956).
Fundamentals of Economic Geography (4th.ed.).
Englewood Cliffs:
Prentice-hall Inc.
Gaya Chicago
BENGSTON,Nels A..
Fundamentals of Economic Geography.
4th.ed.
Englewood Cliffs:
Prentice-hall Inc,
1956.
Teks.
Gaya MLA
BENGSTON,Nels A..
Fundamentals of Economic Geography.
4th.ed.
Englewood Cliffs:
Prentice-hall Inc,
1956.
Teks.
Gaya Turabian
BENGSTON,Nels A..
Fundamentals of Economic Geography.
4th.ed.
Englewood Cliffs:
Prentice-hall Inc,
1956.
Teks.