Buku Teks
Buku Teks SO
Bloomfield, Leonard
Holt, Rinehart and Winston, 1961
Buku Teks SO
edited by Christopher M. Perrins and Alex L.A. Middleton
Grolier International, 1993
Buku Referensi
edited by P.V. Vidyasagar
Mittal Publications, 2000
Buku Referensi