In Harvard referencing style, the in-text citation for the book by André Brink would look like this:
(Brink, 1993, p. 91)
or if you prefer to reference the publication year mentioned (2007), it could be:
(Brink, 2007, p. 91)
Choose the year based on the context of your discussion. If you're referring to the first edition, use 1993; if it's the reprint or second edition, use 2007.