Buchanan, James M., author
Richard D. Irwin, 1968
Buku Teks
Deno, Richard A., author
J.B. Lippincott, 1959
Buku Teks
Bennett, Paul, author
McGraw-Hill, 2011
Buku Teks
Brady, Roger, author
Stanley Thornes, 1992
Buku Teks
Fraser, W.
Macdonald and Jane's, 1978
Buku Teks