edited by Edwin Mansfield
W.W. Norton, 1964
Buku Teks
Isaacs, Asher, 1902-1963
Van Nostrand , 1964
Buku Teks
Dimock, Marshall Edward
Henry Holt , 1953
Buku Teks
Asch, Peter
John Wiley & Sons, 1983
Buku Teks
Gujarati, Damodar N.
McGraw-Hill, 1984
Buku Teks