Hawker, Jeremy
Wiley-Blackwell, 2012
Buku Teks
Godwin-Austen, Richard Bertram
Sheldon, 1993
Buku Teks
Westcott, Cynthia
D. Van Nostrand, 1955
Buku Referensi
Bennett, Claire L.
John Wiley & Sons, 1982
Buku Teks
Scully, Crispian
Martin Dunitz, 1999
Buku Referensi