Gaya APA
Hellman, Hal. (1970).
The City in The World of The Future .
New York:
Dell Publishing.
Gaya Chicago
Hellman, Hal.
The City in The World of The Future.
New York:
Dell Publishing,
1970.
Text.
Gaya MLA
Hellman, Hal.
The City in The World of The Future.
New York:
Dell Publishing,
1970.
Text.
Gaya Turabian
Hellman, Hal.
The City in The World of The Future.
New York:
Dell Publishing,
1970.
Print.