APA Style

Association, :, , , , , C, R, W, R, D. (2011). A sharp brain for life : proven ways to maintain your mind & memories . London: Readers Digest Association , Inc.

MLA Style

Association, :, , , , , Chadd,, Rachel, Warren;, Reader's, Digest. "A sharp brain for life : proven ways to maintain your mind & memories". London: Readers Digest Association , Inc, 2011. Text.