McNeill, William H.
Past and future
Unoiversity Of Chicago, 1954
 Buku Teks SO
Suzie Sri Suparin S. Sudarman
Foreign policy issues in the American Presidential debates
Jurnal Studi Amerika, 2005
 Artikel Jurnal
Augustynek, Zdzislaw
Time: past, present, future
Kluwer Academic, 1989
 Buku Teks SO
Steans, Jill
Gender and international relations : issues, debates and future directions
Polity Press, 2006
 Buku Teks SO
Cooperative cataloging : past, present, and future
edited by Barry B. Baker
The Haworth Press, 1993
 Buku Teks SO