Rio, Angel del
Holt, Rinehart and Winston, Inc., 1961
Buku Teks
Brenan, Gerald, author
At The University Press, 1951
Buku Teks
Dell Publishing Co., 1963
Buku Teks
Tucholsky, Kurt, author
Rowohlt , 1965
Buku Teks
Lawrence, Karen, author
McGraw-Hill Publishing, 1992
Buku Referensi