Marcus, Edward
Bookman Associates, 1960
Buku Teks
Coughlan, Robert
Time Incorporated, 1962
Buku Teks
by William Brass ... [et al.]
Princenton University Press, 1968
Buku Teks
edited by John C. Caldwell and Chukuka Okonjo
Longmans, Green, 1968
Buku Teks SO
Raudino, Simone
Palgrave Macmillan, 2016
Buku Teks