Graham, Sheila Y.
Harcourt Brace Jovanovich , 1972
Buku Teks
Dixey, Graham
Newnes, 1994
Buku Teks
Graham, Billy
World Wide Publications, 1984
Buku Teks
Graham, Ian S.
John Wiley & Sons, 1995
Buku Referensi
Graham-Green, Graham J.
Butterworth, 1973
Buku Teks