Kingsland, William, author
George Allen and Unwin, 1954
Buku Teks
Fleming H Revel Co., 1947
Buku Teks
Brackman, Rabbi Levi, author
American Management Association;, 2008
eBooks
Choi, Wung-bal, author
Bookshil, 2010
Buku Referensi
Wu, Min, author
China International Press, 2011
Buku Teks