Cita APA (7th ed.)

Coker, A., & Richard, C. (1995). Valuing the invironment: Economic approaches to environmental evaluation. John Wiley.

Cita Chicago (17th ed.)

Coker, Annabel, i Cathy Richard. Valuing the Invironment: Economic Approaches to Environmental Evaluation. Chichester: John Wiley, 1995.

Cita MLA (8th ed.)

Coker, Annabel, i Cathy Richard. Valuing the Invironment: Economic Approaches to Environmental Evaluation. John Wiley, 1995.