edited by George W. Brown
University of California Press, 1954
Buku Teks
chapters by Edgar McInnis ... [et al.] ; edited by George W. Brown
University of California Press, 1953
Buku Teks
University League for Social Reform; edited by Peter Russell
McGraw-Hill, 1966
Buku Teks
Backing, Richard C
James Lewis ,
Buku Teks
by Jack Bavington
Maclean-Hunter Learning Materials, 1976
Buku Teks