Bernard, Solomon Martin, author
Prentice-Hall, 1972
Buku Teks
Carson, Kelton, author
Tab Books , 1974
Buku Teks
Pollack, Seymour V., author
Holt Rinehart and Winston, 1983
Buku Teks
Thomas, Alex Jr., author
Rinehart- Press, 1971
Buku Teks
Chapin, Ned, author
McGraw-Hill, 1973
Buku Teks