Gaya APA

Winardi, . et al (2003,2008,2019,2009,2006). Teori Portofolio Dan Analisis Investasi (Ed. 3,Ed. 5,Ed. 6). Yogyakarta: BPFE.

Gaya MLA

Winardi, . et al. "Teori Portofolio Dan Analisis Investasi". Ed. 3,Ed. 5,Ed. 6 Yogyakarta: BPFE, 2003,2008,2019,2009,2006. Text.