APA

Ayres R. U., . (1969). Technological forecasting and long-range planning. New York [etc.]: McGraw-Hill Book Company.

Chicago

Ayres Robert U, . 1969. Technological forecasting and long-range planning. New York [etc.]: McGraw-Hill Book Company.

Harvard

Ayres R. U., . (1969). Technological forecasting and long-range planning. New York [etc.]: McGraw-Hill Book Company.

MLA

Ayres Robert U, . Technological forecasting and long-range planning. New York [etc.]: McGraw-Hill Book Company. 1969.