Vlak, K. (2000). Five Continents: Grade 1 1/2 / Kees Vlak. Rundel.
Chicagoスタイル(17版)引用形式Vlak, Kees. Five Continents: Grade 1 1/2 / Kees Vlak. Rot an der Rot: Rundel, 2000.
MLA(8版)引用形式Vlak, Kees. Five Continents: Grade 1 1/2 / Kees Vlak. Rundel, 2000.
警告: この引用は必ずしも正確ではありません.