MLA

Obal, Michael W, Christian Bushardt, and Nina Krey. Let’s Get Engaged! Crossing the Threshold of Marketing’s Engagement Era. Springer International Publishing, 2016.

APA

Obal, M. W, Bushardt, C., & Krey, N. (2016). Let’s Get Engaged! Crossing the Threshold of Marketing’s Engagement Era. Springer International Publishing.

Chicago

Obal, Michael W., Christian Bushardt, and Nina Krey. Let’s Get Engaged! Crossing the Threshold of Marketing’s Engagement Era. : Springer International Publishing, 2016.