SCHOLASTIC EDUCATION. (2004). 100 MATH ACTIVITIES KIDS NEED TO DO BY 1st GRADE. SCHOLASTIC INS.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)SCHOLASTIC EDUCATION. 100 MATH ACTIVITIES KIDS NEED TO DO BY 1st GRADE. USA: SCHOLASTIC INS, 2004.
MLA -ийн эшлэл (9 дэх хэвлэлт)SCHOLASTIC EDUCATION. 100 MATH ACTIVITIES KIDS NEED TO DO BY 1st GRADE. SCHOLASTIC INS, 2004.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.