Hungerford, T.A.G.
McGraw-Hill, 1990
Buku Teks SO
Collier-Machmilan Limited, 1967
Buku Teks SO
Veerasamy Sejian, editor
[, Springer], 2012
eBooks
McNitt, J.I.
English Language Book Society, 1983
Buku Teks SO
edited by China Pictorial
China Pictorial, [Date of publication not identified]
Buku Teks SO