Williamson, J. Peter (John Peter), author
Scott, Foresman, 1968
Buku Teks
Brownlee, W. Elliot, 1941-, author
Cambridge University Press, 2016
Buku Teks
Bittker, Boris I.
Little, Brown & Co., 1990
Buku Teks
Ferguson, John H., author
McGraw-Hill, 1981
Buku Teks
Gaffney, Dennis J., author
McGraw-Hill, 1982
Buku Teks