APA (7th ed.) Citation

NetLibrary, Inc, & LearningExpress (Organization). (1999). 1001 math problems. LearningExpress.

Chicago Style (17th ed.) Citation

NetLibrary, Inc, and LearningExpress (Organization). 1001 Math Problems. New York: LearningExpress, 1999.

MLA (9th ed.) Citation

NetLibrary, Inc, and LearningExpress (Organization). 1001 Math Problems. LearningExpress, 1999.

Warning: These citations may not always be 100% accurate.