Gaya APA
O\'Toole, Thomas, Cetron, Marvin. (1982).
Encounters with the future: a forecast of life into the 21 century .
New York:
McGraw-Hill Book Company.
Gaya Chicago
O\'Toole, Thomas, Cetron, Marvin.
Encounters with the future: a forecast of life into the 21 century.
New York:
McGraw-Hill Book Company,
1982.
Text.
Gaya MLA
O\'Toole, Thomas, Cetron, Marvin.
Encounters with the future: a forecast of life into the 21 century.
New York:
McGraw-Hill Book Company,
1982.
Text.
Gaya Turabian
O\'Toole, Thomas, Cetron, Marvin.
Encounters with the future: a forecast of life into the 21 century.
New York:
McGraw-Hill Book Company,
1982.
Print.