Gaya APA

SURATRI, M, A, L., NOTOHARTOJO, I, T. (2016). Smoking as a risk factor of periodontal disease . Jakarta: Ministry of Health Indonesia.

Gaya MLA

SURATRI, Made, Ayu, Lely., NOTOHARTOJO, Indirawati, Tjahja. "Smoking as a risk factor of periodontal disease". Jakarta: Ministry of Health Indonesia, 2016. Artikel.