Chomsky, Noam, author
Cambridge University Press, 2002
eBooks
Barnes, Harry Elmer, author
Prentice Hall of India, 1966
Buku Teks
Zeng, Fan-Gang, editor
Springer, 2011
eBooks
edited by Gerald W. Whitted
Pan American World Airways, 1971
Buku Referensi
edited by Gerald W. Whitted
Pan American World Airways, 1963
Buku Referensi