Gaya APA

Pierce, J, L., Newstrom, J, W. (2006). Leders and the leadership process (Fourth Edition). : McGraw-Hill.New York.

Gaya MLA

Pierce, John, L.., Newstrom, John, W.. "Leders and the leadership process". Fourth Edition : McGraw-Hill.New York, 2006. Koleksi World Bank.