edited by Jack Pinkowski
CRC Press, Taylor & Francis Group, 2008
Buku Referensi
White, Jonathan R., 1975-2012
Wadsworth and Cengage Learning, 2012
Buku Teks
Yang, Hu, 1980-
China Intercontinental Press, 2010
Buku Teks
Rajesh Arora, Preeti Arora.
UK CABI, 2013
Buku Teks
Sylves, Richard
Sage, 2020
Buku Teks