Francis, Daniel
Hurtig Publisher, 1982
Buku Teks
Easton, Stewart C., author
Holt, Rinehart and Winston, 1966
Buku Teks
Weber, Eugen, author
D.C. Heath, 1959
Buku Teks
Weber, Eugen, author
D. C. Heath, 1959
Buku Teks
Viorst, Milton, author
Chilton Books, 1965
Buku Teks