Gaya APA

Crom, D, C, A, A, I, J, O, C, D, M. (2011). THE SALES ADVANTAGE . INDONESA: Penerbit Erlangga.

Gaya MLA

Crom, Dale, Carergie, And, Associates,, Inc.,, J., Oliver, Crom,, Dan, Michael. "THE SALES ADVANTAGE". INDONESA: Penerbit Erlangga, 2011. Text.