Gunawan, Annisa, Ai Djuminar, Ernawati Ernawati, and Lidya Chaidir. “Development of Oxgall Preparation As Clinical Sample for Detection of Salmonella Typhi With Real-Time PCR Method”. Jurnal Teknologi Laboratorium 7, no. 2 (December 31, 2018): 70 -77. Accessed July 22, 2019. https://teknolabjournal.com/index.php/Jtl/article/view/127.