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.
Dyfyniad Arddull Chicago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.
Dyfyniad MLA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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.