Cao, Eduardo, author
McGraw-Hill, 2010
Buku Teks
Welty, James R., author
Buku Teks
Rogers, G.F.C. (Gordon Frederick Crichton), author
Longmans, 1967
Buku Teks
Rogers, G.F.C. (Gordon Frederick Crichton), author
ELBS and Longmann, 1970
Buku Teks
Welty, James R., author
Wiley,, 1978.
Buku Teks