Gaya APA

Gibbard, M, S. (1979). Guides to hidden springs, a history of Christian spirituality through the lives of some of its witnesses. . London: SCM Press.

Gaya MLA

Gibbard, Mark,, SSJE.. "Guides to hidden springs, a history of Christian spirituality through the lives of some of its witnesses. ". London: SCM Press, 1979. Buku.