KOTLER, P. (2010). Principles of marketing 13th edition. Pearson.
Lua i Stíl Chicago (17ú heag.)KOTLER, Philip. Principles of Marketing 13th Edition. Pearson, 2010.
Lua MLA (8ú heag.)KOTLER, Philip. Principles of Marketing 13th Edition. Pearson, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.