Gass, Saul I., author
Mc Graw Hill, 1975
Buku Teks
Swanson, Leonard W., author
Mc Graw Hill, 1980
Buku Teks
Gass, Saul I.
McGraw-Hill, 1985
Buku Teks
Djati Kerami, author
Universitas Terbuka, 2008
Buku Teks
Nesa, Wu, author
McGraw-Hill, 1981
Buku Teks