London His Majesty's Stationery Office 1935
Buku Teks
Nicholson, Robert, author
Robert Nicholson Pub., 1988
Buku Referensi
Saunders, Ann, author
Phaidon, 1984
Buku Referensi
Lane, Frederick A
Aladdin Books, 1954
Buku Teks
Rutherfurd, Edward, author
Crwon , 1997
Buku Teks