Grebler, Leo
National Boreau of Economic Research , 1960
Buku Teks SO
edited by Graham Hallett
Routledge, 1993
Buku Teks
Fisher, Robert Moore
Harper & Row, 1959
Buku Teks SO
Meyerson, Martin
McGraw-Hill , 1962
Buku Teks SO
Eric S. Belsky, Christopher E. Herbert, Jennifer H. Molinsky, editors
Brookings Institution Press, 2014
Buku Teks