Παραπομπή σε μορφή APA (7η εκδ.)

(1969). Technological forecasting: A practical approach / [by] Marvin J. Cetron. With a foreword by Ralph C. Lenz, Jr. and with a critical appraisal by Edward B. Roberts.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Technological Forecasting: A Practical Approach / [by] Marvin J. Cetron. With a Foreword by Ralph C. Lenz, Jr. and with a Critical Appraisal by Edward B. Roberts. 1969.

Παραπομπή σε μορφή MLA (9th εκδ.)

Technological Forecasting: A Practical Approach / [by] Marvin J. Cetron. With a Foreword by Ralph C. Lenz, Jr. and with a Critical Appraisal by Edward B. Roberts. 1969.