Leonard , Edwin C., Jr.
South-Western Cengage Learning, 2013
Buku Teks
Boyd, Branford B.
McGraw-Hill , 1984
Buku Teks
Haimann, Theo
South-Western Pub., 1982
Buku Teks
Mosley, Donald C.
South-Western Publishing, 1985
Buku Teks
Black, James Menzies
Pustaka Binawan Pressindo, 1987
Buku Teks