APA Style

Sihombing, G. (1978). An exploratory study on three synthetig colouring matters commonly used as food colours in Jakarta : Thesis . Jakarta: Seameo \r Faculty of Medicine University of Indon, Badan Litbangkes.

MLA Style

Sihombing, Gaertruida. "An exploratory study on three synthetig colouring matters commonly used as food colours in Jakarta : Thesis". Jakarta: Seameo \r Faculty of Medicine University of Indon, Badan Litbangkes, 1978. print.