Gaya APA

Blattberg, R, G., YENTI/2017010462124, P, Y, F. (2001). Customer Equity : Buliding Relationships as Valuable Assets (1). USA: Nusamedia.

Gaya MLA

Blattberg, Robert, G.., YENTI/2017010462124, PRIMA, YUDDY, FEBRIDA. "Customer Equity : Buliding Relationships as Valuable Assets". 1 USA: Nusamedia, 2001. Text.