Celko, J. (2007). Joe Celko's SQL puzzles and answers. Amsterdam: Epsevier.
Trích dẫn kiểu ChicagoCelko, Joe. Joe Celko's SQL Puzzles and Answers. Amsterdam: Epsevier, 2007.
MLA引文Celko, Joe. Joe Celko's SQL Puzzles and Answers. Amsterdam: Epsevier, 2007.
警告:这些引文格式不一定是100%准确.