Backman, Fredrik
Noura Books, 2016
Buku Teks
Teresa Stoppani, Giorgio Ponzo, George Themistokleous.
Routledge, 2017
Buku Teks
Trese, Leo J.
Notre Dame, 1964
Buku Teks SO
Teamwork, Med Press
Media Pressindo, 1999
Buku Teks
Smidak, Emil F.
Avenira Foundation for Research of Human Society, 1996
Buku Teks