Griffiths, Percival, Sir, 1899-
Ernest Benn, 1958
Buku Teks SO
Griffiths, Percival, Sir, 1899-
Praeger, 1957
Buku Teks SO
Chandra, Bipan
National Council of Educational Research and Training, 1971
Buku Teks SO
Spear, Percival
University of Michigan Press, 1961
Buku Teks SO
Spear, Percival
University of Michigan Press, 1961
Buku Teks SO