Penporn Janekarnkij. 1994. Economic incentives for water resource management in the Pak Phanang river basin of southern Thailand. , University of Rhode Island;
Penporn Janekarnkij. (1994) Economic incentives for water resource management in the Pak Phanang river basin of southern Thailand . University of Rhode Island/Rhode Island.
Penporn Janekarnkij. Economic incentives for water resource management in the Pak Phanang river basin of southern Thailand. . Rhode Island:University of Rhode Island, 1994.
Penporn Janekarnkij. (1994) Economic incentives for water resource management in the Pak Phanang river basin of southern Thailand . University of Rhode Island/Rhode Island.