Gaya APA

Lubis, A, R, B. (2006). The Merck Index four edition (four edition ( 4 )). Whitehouse Saton. NJ.USA: Merck & Co. Inc.

Gaya MLA

Lubis, Adi, Raja, Brando. "The Merck Index four edition". four edition ( 4 ) Whitehouse Saton. NJ.USA: Merck & Co. Inc, 2006. Text.