Wicksell, Knut
George Routledge and Sons , 1946
Buku Teks
World Future Society, 1985.
Buku Teks
CP Books, [date of publication not identified]
Buku Teks
Glenn D. Hook, Hasegawa Harukiyo
Routledge, 2001
Buku Teks
Agus Haryanto, author
Program Pascasarjana Universitas Indonesia, 2009
UI - Tesis (Open)