Oxford University Press, 1951
Buku Teks
Europa Publications LTD, 1929
Buku Teks
Gourou, Pierre
Longmans, Green and Co., 1954
Buku Teks
Jones, Antoinette M. Barrett
Foris Publications, 1984
Buku Teks
Dallin, David J.
Yale University Press, 1942
Buku Teks