Steinberg, David J. (David Joel), author
Solidaridad Publishing House, 1967
Buku Teks
George, T.J.S
Oxford University Press, 1980
Buku Teks
London Routledge , 1992
Buku Teks
Adelina Fitri, author
2017
UI - Tesis (Membership)
Charles E. Tuttle, 1977
Buku Teks