Tindall, William York, author
Books for Libraries Press, 1947
Buku Teks
compiled by Ruth Z. Temple; edited by Martin Tucker
Frederick Ungar Publishing, 1981
Buku Referensi
Watson, George, author
Macmillan, 1991
Buku Teks
Richetti, John, author
John Wiley & Sons, 2017
Buku Teks
Houghton Miffiln, 1958
Buku Teks