Gaya APA

Kotler, P., dkk., . (2021). Marketing 4.0 : moving from traditional to digital (Cet.9). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Kotler, Philip., dkk., . "Marketing 4.0 : moving from traditional to digital". Cet.9 Jakarta: Gramedia Pustaka Utama, 2021. Teks.