Spencer, J.E., author
John Wiley & Sons, 1954
Buku Teks
Spencer, J. E.
John Wiley & Sons, 1954
Buku Teks
Crang, Mike, author
Routledge, 1998
Buku Teks
edited by James C. Hsiung
Paragon House, 1985
Buku Teks
Hampshire Palgrave Macmillan, 2014
Buku Teks