Gaya APA

Lehmann, D, R., Winer, R, S. (2005). Product management (ed. 4). Singapura: Mc Graw-Hill.

Gaya MLA

Lehmann, Donald, R.., Winer, Russel, S.. "Product management". ed. 4 Singapura: Mc Graw-Hill, 2005. Text.