Lodge, George C., author
Harper & Row, 1962
Buku Teks
Zack, Arnold
Praeger , 1964
Buku Teks
Millen, Bruce H.
Brokings Institutions , 1963
Buku Teks
Siedman, Joel
Labor Relation Cornel University, 1958
Buku Teks
Page, Sheila, author
Overseas Development Institute, 2000
Buku Teks