edited by Douglas Daymond and Leslie Monkman
Gage Educational Publishing Limited, 1978
Buku Teks
Blair, Walter, author
Scott, Foresman and Company, 1948
Buku Teks
Katz, William A., 1924-, author
McGraw-Hill, 1987
Buku Teks
Katz, William A., 1924-, author
McGraww-Hill, 1992
Buku Teks
R. R. Bowker Company, 1967
Buku Referensi