Παραπομπή APA

Purcell, W. (1979). Agricultural marketing: Systems, coordination cash futures prices. Reston Publishing Company Inc.

Παραπομπή Chicago Style

Purcell, W.D. Agricultural Marketing: Systems, Coordination Cash Futures Prices. Wirginia: Reston Publishing Company Inc, 1979.

Παραπομπή MLA

Purcell, W.D. Agricultural Marketing: Systems, Coordination Cash Futures Prices. Reston Publishing Company Inc, 1979.