Fitzgerald, C.P.
Oxford University Press, 1965
Buku Teks SO
Wu, Ding min
Xin shi jie chu ban she, 2010
Buku Teks
Kirkpatrick, Larry D.
Thomson, Brooks, 2007
Buku Teks
edited by Sidney Mailick; The United Nations Institute for Training and Research
Anchor Press, 1974
Buku Teks
Simpson, George Gaylord
Harcourt Brace & World, 1964
Buku Teks