Williams, N., & Williams, G. (1999). Naum Gabo: 29 April - 26 June 1999, Annely Juda Fine Art, London / catalogue Annely Juda Fine Art / Nina and Graham Williams.
Chicagoスタイル(17版)引用形式Williams, Nina, , Graham Williams. Naum Gabo: 29 April - 26 June 1999, Annely Juda Fine Art, London / Catalogue Annely Juda Fine Art / Nina and Graham Williams. London, 1999.
MLA(8版)引用形式Williams, Nina, , Graham Williams. Naum Gabo: 29 April - 26 June 1999, Annely Juda Fine Art, London / Catalogue Annely Juda Fine Art / Nina and Graham Williams. 1999.
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