Lucas, J., & McKennell, V. (1974). The Penguin book of playgroups. Penguin Books.
Chicagoスタイル(17版)引用形式Lucas, Joyce, , Vivienne McKennell. The Penguin Book of Playgroups. Harmondsworth ; Baltimore: Penguin Books, 1974.
MLA(8版)引用形式Lucas, Joyce, , Vivienne McKennell. The Penguin Book of Playgroups. Penguin Books, 1974.
警告: この引用は必ずしも正確ではありません.