W.H. Freeman, 1982
Buku Teks
Todd, Lewis Paul
Harcourt Brace Jovanovich, 1986
Buku Teks
Barnes, Harry Elmer, author
Prentice-Hall, 1950
Buku Teks
Rose, Ernestine, author
Columbia University Press, 1954
Buku Teks
Pauline, Lawrence J
Cambridge book comp, 1968
Buku Teks