Edwards, Allen L.
Holt, Rinehart and Winston, 1964
Buku Teks
Edwards, Allen L., author
Holt, Rinehart and Winston, 1966
Buku Teks
Kiess, Harold O.
Allyn And Bacob, 1989
Buku Teks
Johnson, Palmer O., author
Prentice-Hall, 1953
Buku Teks
Arkin, Herbert
Barnes & Noble, 1957
Buku Teks