APA Style

Hartson, R., Pyla, P. (2012). The UX Book: process and guidelines for ensuring a quiality user experience . Waltham, MA USA: Elsevier.

MLA Style

Hartson, Rex., Pyla, Pardha. "The UX Book: process and guidelines for ensuring a quiality user experience". Waltham, MA USA: Elsevier, 2012. Text.