APA Style

al, E., Bachroen, C. (1992). Penelitian kegiatan petugas Puskesmas . Surabaya: Puslitbang Yantekkes, Badan Litbangkes.

MLA Style

al, Et., Bachroen, Cholis. "Penelitian kegiatan petugas Puskesmas". Surabaya: Puslitbang Yantekkes, Badan Litbangkes, 1992. print.