The gnostics identifying an early christian cult.

MLA

Logan, Alastair H. B, and Rowan Williams. The Gnostics: Identifying an Early Christian Cult. London: Clark, 2006.

APA

Logan, A. H. B, & Williams, R. (2006). The gnostics: identifying an early christian cult. London: Clark.

Chicago

Logan, Alastair H. B., and Rowan Williams. The Gnostics: Identifying an Early Christian Cult. London: Clark, 2006.