Gaya APA
Circle in a box. (2009).
:
Mathematical Sciences Research Institute.
Gaya Chicago
Circle in a box.
MSRI mathematical circles library 2.
:
Mathematical Sciences Research Institute,
2009.
Text.
Gaya MLA
Circle in a box.
MSRI mathematical circles library 2.
:
Mathematical Sciences Research Institute,
2009.
Text.
Gaya Turabian
Circle in a box.
:
Mathematical Sciences Research Institute,
2009.
Print.