National Gallery (Great Britain) & Davies, M. (1946). Paintings on the backs of National Gallery pictures. National Gallery.
芝加哥风格引文National Gallery (Great Britain) 与 Martin Davies. Paintings on the Backs of National Gallery Pictures. Lond.: National Gallery, 1946.
MLA引文National Gallery (Great Britain) 与 Martin Davies. Paintings on the Backs of National Gallery Pictures. National Gallery, 1946.
警告：这些引文格式不一定是100％准确.