Special law required for government employee labor unions
 Artikel Jurnal
Beirne, Joseph A.
Challenge to Labor new roles for American trade unions
Prentice-Hall, 1969
 Buku Teks
Dunlop, John T.
Wage determination under trade unions / John T. Dunlop
Augustus M. Kelley, 1966
 Buku Teks
Japanese labor-management relations in an era of diversification of employment types diversifying workers and the role of labor unions Mitsuru Yamashita
 Artikel Jurnal
Labor in a changing America / William Haber (ed.)
Basic Books, Inc Publisher, 1966
 Buku Teks