APA Style

Muljono, Ryan Kristo. (2018). Digital marketing concept . Jakarta: Gramedia Pustaka Utama.

Chicago Style

Muljono, Ryan Kristo. Digital marketing concept. Jakarta: Gramedia Pustaka Utama, 2018. Text.

MLA Style

Muljono, Ryan Kristo. Digital marketing concept. Jakarta: Gramedia Pustaka Utama, 2018. Text.

Turabian Style

Muljono, Ryan Kristo. Digital marketing concept. Jakarta: Gramedia Pustaka Utama, 2018. Print.