edited by Maureen Baker
McGraw-Hill Ryerson, 1984
Buku Teks
Iowa State University Press , 1964
Buku Teks
International labour office , 1988
Buku Teks
Strong, Bryan, author
Wadsworth, 2008
Buku Teks
chapters by Edgar McInnis ... [et al.] ; edited by George W. Brown
University of California Press, 1953
Buku Teks