Levi, Maurice D., 1945-
McGraw-Hill, 1990
Buku Teks
Nehrt, Lee Charles
International Textbook, 1967
Buku Teks
Nehrt, Lee Charles
Intext Educational, 1972
Buku Teks
Levi, Maurice D., 1945-
McGraw-Hill, 1983
Buku Teks
edited by Donald R. Lessar
John Wiley & Sons, 1985
Buku Teks