Skerman, V.B.D.
The Williams & Wilkins, 1967
Buku Teks
Academic Press , 1990
Buku Teks
edited by S.T. Cowan, G.I. Barrow, R.K.A. Feltham
Cambridge University Press, 1993
Buku Teks
Muir, Robert
Henry Frowde, Hodder & Stoughton, 1921
Buku Teks
by John G. Holt [and others]
Williams & Wilkins, 1993
Buku Teks