APA (7th ed.) Citation

Isangkura, A. (1998). Environment valuation: An entrance fee system for National Parks in Thailand. Economy and Environment Program for Southeast Asia.

Chicago Style (17th ed.) Citation

Isangkura, Adis. Environment Valuation: An Entrance Fee System for National Parks in Thailand. Singapore: Economy and Environment Program for Southeast Asia, 1998.

MLA (9th ed.) Citation

Isangkura, Adis. Environment Valuation: An Entrance Fee System for National Parks in Thailand. Economy and Environment Program for Southeast Asia, 1998.