Gaya APA

PENINGTON,Ralph, . (1991). Introductory computer metods and numerial analisys (Ed.1 Cet.1). Jakarta: Yayasan Obor Indonesia.

Gaya MLA

PENINGTON,Ralph, . "Introductory computer metods and numerial analisys". Ed.1 Cet.1 Jakarta: Yayasan Obor Indonesia, 1991. Buku.