Gaya APA

Lubis, F., al, E. (1972). A description of the Kecamatan Serpong (Family planning project Serpong Indonesia) . Jakarta: Universitas Indonesia, Badan Litbangkes.

Gaya MLA

Lubis, Firman., al, Et. "A description of the Kecamatan Serpong (Family planning project Serpong Indonesia)". Jakarta: Universitas Indonesia, Badan Litbangkes, 1972. print.