APA Style

Campbell, I, D., Schweitzer, W, M. (2013). Engaging with Keller : thinking through the theology of an influential evangelical . Darlington, England: EP Books.

MLA Style

Campbell, Iain, D.., Schweitzer, William, M.. "Engaging with Keller : thinking through the theology of an influential evangelical". Darlington, England: EP Books, 2013. Ebook.