Lua APA (7ú heag.)
Blokdyk, G. (2019). Customer Intelligence: A Complete Guide - 2019 Edition. The Art of Service.
Lua i Stíl Chicago (17ú heag.)
Blokdyk, Gerardus. Customer Intelligence: A Complete Guide - 2019 Edition. Brendale, Australia: The Art of Service, 2019.
Lua MLA (9ú heag.)
Blokdyk, Gerardus. Customer Intelligence: A Complete Guide - 2019 Edition. The Art of Service, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.