Mayerson, Evelyn W
Saunders, 1979
Buku Teks
Hynes, Geraldine E.
McGraw-Hill, 2004
Buku Teks
Machin, John L.J., author
McGraw-Hill, 1980
Buku Teks
Munter, Mary, author
Prentice-Hall, 1982
Buku Referensi
Tan, Soo T., author
Brooks/Cole Cengage Learning, 2012
Buku Teks