edited by Royall Brandis and Steven R. Cox
Richard D. Irwin, 1972
Buku Teks
Homan, Paul T.
Harcourt, Brace and Company, 1958
Buku Teks
Wernette, Philip
Macmillan, 1955
Buku Teks
Breyer, Ralph Frederick, 1897-, author
McGraw-Hill, 1934
Buku Teks
Galbraith, John Kenneth, 1908-2006, author
Houghton Miffiln, 1952
Buku Teks