Jessup, Philip Caryl, 1897-1986, author
Macmillan, 1958
Buku Teks
Reeves, Joan Wynn, author
Penguin books, 1958
Buku Teks
Frank, Jerome
Da Capo Press, 1971
Buku Teks
Howes, Frank
Secker & Warburg, 1948
Buku Teks
Mancill, Julian D.
Dodd, Mead & Company, 1968
Buku Teks