Gaya APA

Soemartono, ., al, E. (1991). Stratification approach in health management system in Indonesia . Surabaya: Puslitbang Yantekkes, Badan Litbangkes.

Gaya MLA

Soemartono, ., al, Et. "Stratification approach in health management system in Indonesia". Surabaya: Puslitbang Yantekkes, Badan Litbangkes, 1991. print.