Gaya APA

Hutauruk, G. et al (1986). Dasar-dasar matematika ekonomi = fundamental methods of mathematical economics jilid 2 (Ed. 3). Jakarta: Erlangga.

Gaya MLA

Hutauruk, Gunawan. et al. "Dasar-dasar matematika ekonomi = fundamental methods of mathematical economics jilid 2". Ed. 3 Jakarta: Erlangga, 1986. Text.