Osborn, Alex
Charles Scribner`s Sons, 1952
Buku Teks
Russell, Bertrand, 1872-1970, author
George Allen and Unwin, 1956
Buku Teks
Chomsky, Noam, author
Cambridge University Press, 2006
eBooks
Bono, Edward de, author
Simon and Schuster , 1969
Buku Teks
Hedgecoe, Mark.
BBC Worldwide Limited, 2005
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