APA
Walsh P., Retik A., Vaughan D. & Wein A. (1997). Campbell's. London: W.B.Saunders company.
Chicago
Walsh Patrick.C, Retik Alan,B, Vaughan Darracott,E and Wein Alan. 1997. Campbell's. London: W.B.Saunders company.
Harvard
Walsh P., Retik A., Vaughan D. and Wein A. (1997). Campbell's. London: W.B.Saunders company.
MLA
Walsh Patrick.C, Retik Alan,B, Vaughan Darracott,E and Wein Alan. Campbell's. London: W.B.Saunders company. 1997.
