Gaya APA

Coopeeer, D, R., Schindler, P, S. (2006). Business research methods ninth edition (ninth edition). New York: McGraw-Hill/Irwin.

Gaya MLA

Coopeeer, Donald, R.., Schindler, Pamela, S.. "Business research methods ninth edition". ninth edition New York: McGraw-Hill/Irwin, 2006. MPK.