Gaya APA

Randall,Alan, . (1987). Resource Economics an Economic Approach to Natural Resource and Environmental Policy.Randall (2nd). New York: John Wiley and Sons,.

Gaya MLA

Randall,Alan, . "Resource Economics an Economic Approach to Natural Resource and Environmental Policy.Randall". 2nd New York: John Wiley and Sons,, 1987. Text.