Não informado. Perceptual Cognitive Development. Galton Institute.
Chicagoスタイル(17版)引用形式Não informado. Perceptual Cognitive Development. Los Angeles, Calif: Galton Institute.
MLA(8版)引用形式Não informado. Perceptual Cognitive Development. Galton Institute.
警告: この引用は必ずしも正確ではありません.