Robertson, E. Graeme
Routledge & K. Paul, 1972
Buku Referensi
edited by Otto Hoever
Dover, 2001
Buku Referensi
Vaillant, Pablo Valenzuela
BHA Impresores, 1993
Buku Referensi
Brooks, Cleanth
Reynal & Hitchcock, 1947
Buku Teks
Park, Mok Wol
Daesan, 2007
Buku Teks