APA Format
Berkowitz, Eric N. . (). Essentials of ...: Product strategy. ( Ket. Lihat halaman 257-286 ) ( Bab. 8 ) . : London: Jones and Bartlett Learning, 2011
MLA Format
Berkowitz, Eric N. . Essentials of ...: Product strategy. ( Ket. Lihat halaman 257-286 ) ( Bab. 8 ) . : London: Jones and Bartlett Learning, 2011,
Australian/Harvard Format
Berkowitz, Eric N. . . Essentials of ...: Product strategy. ( Ket. Lihat halaman 257-286 ) ( Bab. 8 ) . London: Jones and Bartlett Learning, 2011, 
Warning: These citations may not always be 100% accurate.