Hoover, Herbert, 1874-1964, author
McGraw-Hill, 1958
Buku Teks
Wilson, Eva, 1925-, author
London British Museum Press 1999,
Buku Referensi
Bailey, S.J.
Sir Issac Pitman & Sons, LTD, 1948
Buku Teks
George Braziller, 1966
Buku Teks
Oosterhoff, A.H., author
Carswell, 2011
Buku Teks