Hoel, Paul Gerhard, 1905-, author
Hughton Mifflin, 1971
Buku Teks
MacCollough, Caleste, author
McGraw-Hill, 1963
Buku Teks
Larson, Harold J., 1934-, author
John Wiley & Sons, 1974
Buku Teks
Amos, Jimmy
Harper & Row , 1965
Buku Teks
Dixon, Wilfrid J. (Wilfrid Joseph), author
McGraw-Hill, 1983
Buku Teks