Morton, Desmond, author
Samuel Stevens, 1977
Buku Teks
Manzer, Ronald A., author
McGraw-Hill Ryerson, 1974
Buku Teks
chapters by Edgar McInnis ... [et al.] ; edited by George W. Brown
University of California Press, 1953
Buku Teks
Brady, Alexander, author
University of Toronto Press, 1948
Buku Teks
Smiley, Donald V.
McGraw-Hill Ryerson, 1980
Buku Teks