edited by Jack Pinkowski
CRC Press, Taylor & Francis Group, 2008
Buku Referensi
White, Jonathan R., 1975-2012, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Rajesh Arora, Preeti Arora.
UK CABI, 2013
Buku Teks
Sylves, Richard, author
Sage, 2020
Buku Teks
White, Jonathan Randall, author
Wardsworth, 2004
Buku Teks