Sec. de: Kotler, Philip. Marketing 3.0... 2010 (orelha: fundador e CEO da MarkPlus, Inc.)

LC authorities 08/09/10 (d.n. 18/11/47, em Surabaya, Indonésia; rems.)

http://catalogue.bl.uk/ 08/09/10 (d.n.)

http://catalogue.bnf.fr/ 08/09/10