Citazione Stile APA (7a Edizione)

Johnson, R. L., & Johnson, G. V. (1990). Economic valuation of natural resources: Issues, theory, and applications. Westview Press.

Citazione stile Chigago Style (17a edizione)

Johnson, Rebecca L., e Gary V. Johnson. Economic Valuation of Natural Resources: Issues, Theory, and Applications. Boulder: Westview Press, 1990.

Citatione MLA (9a ed.)

Johnson, Rebecca L., e Gary V. Johnson. Economic Valuation of Natural Resources: Issues, Theory, and Applications. Westview Press, 1990.