APA Style

Hanke, J, E., Reitsch, A, G. (1991, 1994). Understanding Business Statistics (Sixth Edition). Australia: RICHARD D. IRWIN,INC.,.

MLA Style

Hanke, John, E.., Reitsch, Arthur, G.. "Understanding Business Statistics". Sixth Edition Australia: RICHARD D. IRWIN,INC.,, 1991, 1994. Text.