Παραπομπή σε μορφή APA (7η εκδ.)

Thirtle, C. G., & Ruttan, V. W. (1987). The role of demand and supply in the generation and diffusion of technical change. Harwood Academic Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Thirtle, Colin G., και Vernon W. Ruttan. The Role of Demand and Supply in the Generation and Diffusion of Technical Change. Chur, Switzerland ; New York: Harwood Academic Publications, 1987.

Παραπομπή σε μορφή MLA (8th εκδ.)

Thirtle, Colin G., και Vernon W. Ruttan. The Role of Demand and Supply in the Generation and Diffusion of Technical Change. Harwood Academic Publications, 1987.