CHILDCRAFT: SHAPES AND NUMBERS. World Book.
Chicago Style (17th ed.) CitationCHILDCRAFT: SHAPES AND NUMBERS. World Book.
MLA引文CHILDCRAFT: SHAPES AND NUMBERS. World Book.
警告：這些引文格式不一定是100％准確.
APA引文
CHILDCRAFT: SHAPES AND NUMBERS. World Book.
Chicago Style (17th ed.) CitationCHILDCRAFT: SHAPES AND NUMBERS. World Book.
MLA引文CHILDCRAFT: SHAPES AND NUMBERS. World Book.