Cita APA (7th ed.)

Sinden, J. A., & Worrell, A. C. (1979). Unpriced values: Decisions without market prices. John Wiley.

Cita Chicago (17th ed.)

Sinden, John A., i Albert Cadwallader Worrell. Unpriced Values: Decisions Without Market Prices. Nueva York: John Wiley, 1979.

Cita MLA (9th ed.)

Sinden, John A., i Albert Cadwallader Worrell. Unpriced Values: Decisions Without Market Prices. John Wiley, 1979.