Halford, D.R.C.
Pan Books, 1971
Buku Teks
Shubin, John A.
Barnes & Noble, 1975
Buku Teks
Auger, B.Y.
America Manufacturing Company , 1972
Buku Teks
Siropolis, Nicholas C.
Houghton Miffiln, 1977
Buku Teks
Walthall, Wylie A.
Harper and Row, 1987
Buku Teks