Gaya APA

Kotler, P. et al (2017). e-Book - Marketing 4.0: Moving from Traditional to Digital (Cet. 1). : John Wiley & Sons, Inc..

Gaya MLA

Kotler, Philip. et al. "e-Book - Marketing 4.0: Moving from Traditional to Digital". Cet. 1 : John Wiley & Sons, Inc., 2017. Electronic Resource.