Viorst, Milton
Bantam Book, 1965
Buku Teks SO
Robenso, James Harvey
Ginn , 1931
Buku Teks SO
Freymond, Jacques
Frederick A. Preager, 1964
Buku Teks
Boak, Arthur E.R.
Appleton-Century-Crofts, 1951
Buku Teks SO
edited by V.A.C. Gatrell, Bruce Lenman, and Geoffrey Parker
Europa Publications, 1980
Buku Referensi