Gaya APA

Seufert, E, B. (2014). (E-BOOK - SISTEM INFORMASI - TEKNIK INFORMATIKA) Freemium Economics Leveraging Analytics and User Segmentation to Drive Revenue (1). USA: Elsevier, Inc..

Gaya MLA

Seufert, Eric, Benjamin. "(E-BOOK - SISTEM INFORMASI - TEKNIK INFORMATIKA) Freemium Economics Leveraging Analytics and User Segmentation to Drive Revenue". 1 USA: Elsevier, Inc., 2014. Computer File.