修兹. (2009). 数独精选100题 4: Sudoku to boost your brainpower persented by Will Shortz. 北京理工大学出版社.
Čikaški stil citiranja (17. izdanje)修兹. 数独精选100题 4: Sudoku to Boost Your Brainpower Persented by Will Shortz. 北京理工大学出版社, 2009.
MLA način citiranja (8. izdanje)修兹. 数独精选100题 4: Sudoku to Boost Your Brainpower Persented by Will Shortz. 北京理工大学出版社, 2009.
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