Gaya APA

Unger, R, M., Kuppillas, J. (1991). Success is a choice: strategies for achieving your greatest potential . Malaysia: Advantage quest publications.

Gaya MLA

Unger, Robert, M.., Kuppillas, John. "Success is a choice: strategies for achieving your greatest potential". Malaysia: Advantage quest publications, 1991. FE-Manajemen.