BIRD, John and ROSS, Carl T.F. (2012) UNSPECIFIED Routledge, London. ISBN 978 041 551 785 0

BIRD, John (2010) UNSPECIFIED Elsevier, Oxford. ISBN 978 185 617 697 2

BIRD, John (2006) UNSPECIFIED Elsevier, Oxford. ISBN 978 075 068 152 0

BIRD, John and ROSS, Carl (2002) UNSPECIFIED Newnes, Oxford. ISBN 978 075 065 228 4