Leftwich, Richard H.
Economics of social issues
Business Publications, 1974
 Buku Teks SO
Sharp, Ansel M.
Economics of social issues
McGraw-Hill, 2000
 Buku Teks SO
Sharp, Ansel M.
Economics of social issues
McGraw-Hill, 1998
 Buku Teks SO
Sharp, Ansel M.
Economics of social issues
McGraw-Hill, 2002
 Buku Teks SO
Leftwich, Richard H.
Economics of social issues
Business Publications, 1982
 Buku Teks SO