Williams, Edwin B.
Holt, Rinehart and Winston, [Date of publication not identified]
Buku Referensi
Walls, Alfonso Vasseur
Mexico Diana S.A. 1963
Buku Referensi
Sinamo, Jansen H.
Mahardika, 2005
Buku Teks
Dwi Woro Retno Mastuti
Rumah Cinwua, 2023
Buku Klasik
Saramago, Jose
Caminho, 1999
Buku Teks