Shepherd, William G., author
Prentice-Hall, 1979
Buku Teks
Woodward, Joan, author
Oxford University Press, 1965
Buku Teks
Church, Jeffrey, author
McGraw-Hill, 2000
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1945
Buku Teks
Bethel, Lawrence L., author
McGraw-Hill Kogakusha, 1971
Buku Teks