Traister, John E., author
McGraw-Hill, 1997
Buku Referensi
McPartland, Joseph F., author
McGraw-Hill, 1960
Buku Teks
McPartland, Joseph F., author
McGraw-Hill, 1984
Buku Referensi
Pender, Harold, author
John Wiley & Sons, 1950
Buku Referensi
Traister, John E., author
Reston Publishing Company, 1978
Buku Referensi