Allen, F. R. (1957). Technology and social change. Appleton-Century-Crofts, Inc.
Cita Chicago (17th ed.)Allen, Francis R. Technology and Social Change. New York, New York: Appleton-Century-Crofts, Inc, 1957.
Cita MLA (9th ed.)Allen, Francis R. Technology and Social Change. Appleton-Century-Crofts, Inc, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.