Gaya APA
YAO, Zhang. (2011).
Combinatorial Problems in Mathematical Competitions Vol. 4 .
China:
ECNUP.
Gaya Chicago
YAO, Zhang.
Combinatorial Problems in Mathematical Competitions Vol. 4.
China:
ECNUP,
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Gaya MLA
YAO, Zhang.
Combinatorial Problems in Mathematical Competitions Vol. 4.
China:
ECNUP,
2011.
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Gaya Turabian
YAO, Zhang.
Combinatorial Problems in Mathematical Competitions Vol. 4.
China:
ECNUP,
2011.
.