O`neill, Eugene, author
Miccrocard Editions, 1972
Buku Teks
Weales, Gerald Clifford, 1925-, author
Macmillan, 1969
Buku Teks
Nannes, Caspar H,
The Catholic University, 1960
Buku Teks
Lindsay, Howard
Random House, 1946
Buku Teks
edited by Barrett H. Clark and George Freedley
D. Appleton-Century, 1947
Buku Teks