edited by George H. Blakeslee
Steven, 1949
Buku Teks
Weale, Putnam
Macmillan, 1905
Buku Teks
MacNair, Harley Farnsworth
D.van Nostrand Company,Inc., 1955
Buku Teks
MacNair, Harley Farnsworth
D.van Nostrand Company,Inc., 1950
Buku Teks
Peffer, Nathaniel
University of Michigan Press, 1958
Buku Teks