edited by Peter Mansfield
Oxford University Press, 1973]
Buku Teks SO
Bullard, Reader
Oxford university Press, 1958
Buku Teks SO
Morrison, Stanley Andrew
SCM Press, 1954
Buku Teks SO
Stocking, George W.
Vanderbilt University Press, 1970
Buku Teks
edited by Shireen Hunter ; foreword by Robert G. Neumann and G. Henry M. Schuler
Westview Press, 1985
Buku Teks