Robbins, Harold, 1916-1997
New English Library, 1982
Koleksi Publik
Kaplan, Wilfred, author
Addison-Wesley, 1966
Buku Teks
Davio, Marc, author
McGraw-Hill, 1978
Buku Teks
Schumaker, Larry L., author
John Wiley & Sons, 1981
Buku Teks
Bogart, Kenneth P., author
Houghton Miffiln, 1977
Buku Teks