Black, James Menzies
Pustaka Binawan Pressindo, 1987
Buku Teks
Haimann, Theo
South-Western Pub., 1982
Buku Teks
Boyd, Branford B.
McGraw-Hill , 1984
Buku Teks
Leonard , Edwin C., Jr.
South-Western Cengage Learning, 2013
Buku Teks
Luthans, Fred
McGraw-Hill , 1979
Buku Teks