Spengler, Oswald
Alfred A. Knopp, 1947
Buku Teks SO
Waugh, Evelyn, 1903-1966
Everyman's Library, 1993
Buku Teks SO
Goodman, Craufurd D.
Institute of International Education, 1966
Buku Teks SO
Ronald Van Kempen; Gideon Bolt; Maarten Van Ham, editors
Routledge, Taylor & Francis Group, 2018
Buku Teks SO
Mann, Thomas
Everyman`s Library, 2001
Buku Referensi