Gaya APA
Illingworth, John R.. (1975).
Getting the sums right .
:
Pergamon Press.
Gaya Chicago
Illingworth, John R..
Getting the sums right.
:
Pergamon Press,
1975.
Computer Software.
Gaya MLA
Illingworth, John R..
Getting the sums right.
:
Pergamon Press,
1975.
Computer Software.
Gaya Turabian
Illingworth, John R..
Getting the sums right.
:
Pergamon Press,
1975.
Computer Software.