Coats, Willson H.
McGraw-Hill, 1966
Buku Teks
Guy Lachapelle, John Trent, editor
Presses de l'Universitel de Montrelal, 2000
Buku Teks
Amerika : Prentice-hall, 1967
Buku Teks
Johan, Khasnor
Oxford University Press, 1984
Buku Teks
Niel, Robert Van, author
W. van Hoeve Publishers, 1970
Buku Teks