Let’s Get Engaged! Crossing the Threshold of Marketing’s Engagement Era
  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.