Milivojevic, Dragoljub
Information Service, 1962
Buku Teks SO
Schwartz, Benjamin
Harvard University Press, 1952, 1961
Buku Teks SO
Schwartz, Benjamin
Harper Torchbooks and The Academy Library, 1967
Buku Teks SO
Goodrich, L. Carrington (Luther Carrington), 1894-
Harper and Brothers, 1943
Buku Teks SO
Goodrich, L. Carrington (Luther Carrington), 1894-
Harper and Brothers, 1959
Buku Teks SO