Gaya APA
Wills, Gordon. (1972).
Technological forecasting .
Maryland:
Penguin Books.
Gaya Chicago
Wills, Gordon.
Technological forecasting.
Maryland:
Penguin Books,
1972.
Text.
Gaya MLA
Wills, Gordon.
Technological forecasting.
Maryland:
Penguin Books,
1972.
Text.
Gaya Turabian
Wills, Gordon.
Technological forecasting.
Maryland:
Penguin Books,
1972.
Print.