Gibbings, W.W.
Gramedia Pustaka Utama, 2013
Buku Teks
Fletcher, Sydney E.
Grosset & Dunlap, 1954
Buku Teks
Key, Mary Ritchie
Tubingen Gunter Narr Verlag 1979
Buku Teks
Feder, Norman
H. N. Abrams, 1973
Buku Teks
University of Nebraska Press, 1967
Buku Teks