Roypimjai Jaimun และ Nathsuda Pumijumnong. (2014) Cost-benefit analysis of renewable energy pilot project for sustainble tourism at Phu Kradung national park, Thailand. Mahidol University:ม.ป.ท.Roypimjai Jaimun และ Nathsuda Pumijumnong. 2014. Cost-benefit analysis of renewable energy pilot project for sustainble tourism at Phu Kradung national park, Thailand. ม.ป.ท.:Mahidol University;Roypimjai Jaimun และ Nathsuda Pumijumnong. Cost-benefit analysis of renewable energy pilot project for sustainble tourism at Phu Kradung national park, Thailand. ม.ป.ท.:Mahidol University, 2014. Print.