Lower, Arthur R.M.
Longmans, Green and Company, 1959
Buku Teks
Lower, Arthur R.M.
Longmans, Green and Company, 1958
Buku Teks
Lower, Arthur R.M.
The Ryerson Press, 1952
Buku Teks
Siegel, Arthur
McGraw-Hill Ryerson, 1983
Buku Teks
Marwick, Arthur
Macmillan, 1970
Buku Teks