Shaplen, Robert
The lost revolution: the story of twenty years of neglected opportunities in Vietnam and of America's failure foster democracy there
Harper & Row, 1965
 Buku Teks
Bryson, Bill
I'm a stranger here myself : notes on returning to America after twenty years away
Broadway Books, 2000
 Buku Teks
Davidson, Jamie S.
Indonesia: twenty years of democracy
Cambridge University Press, 2018
 Buku Teks
China in the next 30 years
Michael Hudson, Li, Daokui; Pan, Wei; Wang, Huiyo; Wu, JIngjin; Yu, Keping; Cheng, Enfu; Robert, W. Fogel
Zhong yang bian yi chu ban she, 2011
 Buku Teks
China in the next 30 years
Michael Hudson ... [et al.]
CIP, 2011
 Buku Teks