edited by A.M. Eastman and G.B. Harrison
University of Michigan Press, 1964
Buku Teks
Steppat, Michael, author
B.R. Gruner, 1980
Buku Teks
Styan, J.L., author
Cambridge University Pres, 1977
Buku Teks
edited by Hyder Edward Rollins
J.B. Lippincott, 1944
Buku Teks
edited by J.V. Cunningham
Fawcett Publications, 1970
Buku Teks