Gaya APA
Hellman, Hal. (1973).
The City in The World of The Future .
USA:
Dell Publishing.
Gaya Chicago
Hellman, Hal.
The City in The World of The Future.
USA:
Dell Publishing,
1973.
Text.
Gaya MLA
Hellman, Hal.
The City in The World of The Future.
USA:
Dell Publishing,
1973.
Text.
Gaya Turabian
Hellman, Hal.
The City in The World of The Future.
USA:
Dell Publishing,
1973.
Print.