Pascual, Anna Garcia, editor
Idea Books,
Buku Referensi
Robertson, E. Graeme, author
Routledge & K. Paul, 1972
Buku Referensi
edited by Otto Hoever
Dover, 2001
Buku Referensi
Brooks, Cleanth
Reynal & Hitchcock, 1947
Buku Teks
Vaillant, Pablo Valenzuela, author
BHA Impresores, 1993
Buku Referensi