Cita APA (7th ed.)

Tapvong, C., & Kruavan, J. (1999). Water quality improvements: A contingent valuation study of Chao Phraya River. Economy and Environment Program for Southeast Asia.

Cita Chicago (17th ed.)

Tapvong, Churai, i Jittapatr Kruavan. Water Quality Improvements: A Contingent Valuation Study of Chao Phraya River. Singapore: Economy and Environment Program for Southeast Asia, 1999.

Cita MLA (9th ed.)

Tapvong, Churai, i Jittapatr Kruavan. Water Quality Improvements: A Contingent Valuation Study of Chao Phraya River. Economy and Environment Program for Southeast Asia, 1999.