修兹. (2009). 数独精选100题 3: Ultimate sudoko challenge presented by Will Shortz. 北京理工大学出版社.
Chicago Style (17. basım) Atıf修兹. 数独精选100题 3: Ultimate Sudoko Challenge Presented by Will Shortz. 北京理工大学出版社, 2009.
MLA (8th ed.) Atıf修兹. 数独精选100题 3: Ultimate Sudoko Challenge Presented by Will Shortz. 北京理工大学出版社, 2009.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..