Douglas, William O., author
Doubleday, 1961
Buku Teks
Bomans, Godfried, 1913-1971, author
Elsevier, 1972
Buku Teks
Weinberger, Andrew D., author
Chandler Publishing, 1962
Buku Teks
Williams, Kate
MacMillan Press , 1989
Buku Teks
Williams, Frederick
Harcourt Brace Jovanovich College Publishers, 1992
Buku Teks