Collins, J. (2017). Good to great. Gramedia Pustaka Utama.
Lua i Stíl Chicago (17ú heag.)Collins, Jim. Good to Great. Gramedia Pustaka Utama, 2017.
Lua MLA (8ú heag.)Collins, Jim. Good to Great. Gramedia Pustaka Utama, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.