Kotler, P. (1984). Marketing essentials. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Kotler, Philip. Marketing Essentials. .Englewood Cliffs, N.J: Prentice-Hall, 1984.
Lua MLA (9ú heag.)Kotler, Philip. Marketing Essentials. Prentice-Hall, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.