Παραπομπή σε μορφή APA (7η εκδ.)

Baumol, W. J., Nelson, R. R., & Wolff, E. N. (1994). Convergence of productivity: Cross-national studies and historical evidence. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Baumol, William J., Richard R. Nelson, και Edward N. Wolff. Convergence of Productivity: Cross-national Studies and Historical Evidence. New York: Oxford University Press, 1994.

Παραπομπή σε μορφή MLA (9th εκδ.)

Baumol, William J., et al. Convergence of Productivity: Cross-national Studies and Historical Evidence. Oxford University Press, 1994.