Visrutaratna, Surasing, Siriporn Wongchai, Manoon Jaikueankaew, Eiko Kobori, Kihara Masako, and Kihara Masahiro. 2010. “Sexual Behavior of Japanese Tourists Visiting Thailand a Key Informant Approach”. Journal of Public Health and Development 8 (1). Bangkok, Thailand:33-44. https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/105428.