O-Prasertsawat , Pratak, Samarn Phiromsawat, Pansak Sugkraroek, and Sompol Pongthai. 1990. “The Efficacy of Spectinomycin, Norfloxacin and Ciprofloxacin in the Treatment of Uncomplicated Gonorrhoeae”. Thai Journal of Obstetrics and Gynaecology 2 (1). Bangkok, Thailand:19-22. https://he02.tci-thaijo.org/index.php/tjog/article/view/257895.