Bowen, James, 1979-, author
Hodder, 2013
Buku Teks
Herriot, James, 1916-1995, author
PT Gramedia Pustaka Utama, 2019
Buku Teks
Birkhoff, Garrett, author
John Wiley & Sons, 1978
Buku Teks
Ross, Shepley L.
"New York: John Wiley & Sons, 1981",
Buku Teks
Universitas Indonesia, 2007
UI - Skripsi (Membership)