APA Style

N, S., JM, G. (2015). The Seven Principles for Making Marriage Work: A Practical Guide from the Country’s Foremost . New Yok: Harmony Books.

MLA Style

N, Silver., JM, Gottman. "The Seven Principles for Making Marriage Work: A Practical Guide from the Country’s Foremost". New Yok: Harmony Books, 2015. EBOOKS.