Gaya APA
Verity, D, B, P, H, B, J, R.
(2001).
Key Maths 9
.
Cheltenham:
Nelson Thornes Ltd.
Gaya MLA
Verity, David, Baker, Paul, Hogan, Barbara, Job, Renie.
"Key Maths 9".
Cheltenham:
Nelson Thornes Ltd,
2001.
.