Lanyi, George A.
Random House , 1966
Buku Teks
Kalijarvi, Thorsten V., author
Thomas Y. Crowell, 1954
Buku Teks
John Baylis, Steve Smith, Patricia Owens.
Oxford University Press, 2014
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Macmillan, 1951
Buku Teks
Schuman, Frederick L., author
McGraw-Hill, 1958
Buku Teks