Porter, Warren, author
Jones & Bartlett, 2011
Buku Teks
Cambridge University Press, 2016
eBooks
David E. Hogan, editor; Jonathan L. Burstein, editor
J.B. Lippincott, 2002
Buku Teks
Rajesh Arora, Preeti Arora.
UK CABI, 2013
Buku Teks
Fadhi Muhammad, author
2019
UI - Skripsi (Membership)