GRAFALCO BOOKS. (2012). GRAFALCO PRE - SCHOOL NUMBERS (1 - 20). GRAFALCO PUBLICTIONS.
Chicagoスタイル(17版)引用形式GRAFALCO BOOKS. GRAFALCO PRE - SCHOOL NUMBERS (1 - 20). GRAFALCO PUBLICTIONS, 2012.
MLA(9版)引用形式GRAFALCO BOOKS. GRAFALCO PRE - SCHOOL NUMBERS (1 - 20). GRAFALCO PUBLICTIONS, 2012.
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