Hang, Chuon Naron
Cambodian economy: charting the course of a brighter future; a survey of progress, problems and prospects
Institute of South East Asia Studies, 2012
 eBooks
Downs, Anthony
Urban problems and prospects
Markham Publishing, 1970
 Buku Teks
Public personnel administration : problems and prospects
edited by Steven W. Hays, Richard C. Kearney
Prentice-Hall, 1990
 Buku Teks
Peters, Gary L.
Population geography: problems, concepts, and prospects
Kendall/Hunt, 1983
 Buku Teks
Chacko, George K
Technological forecontrol prospects, problems and policy
North-Holland , 1975
 Buku Teks