Theo van Doesburg. <i>Design for Stained Glass Composition XIII</i>. 1924. Pencil, Indian ink and gouache on paper. 99 × 32 cm. <a href="//commons.wikimedia.org/wiki/Locarno" title="Locarno">Locarno</a>, Pinacoteca Casa Rusca.
<bdi><a href="https://en.wikipedia.org/wiki/en:Theo_van_Doesburg" class="extiw" title="w:en:Theo van Doesburg"><span title="Dutch architect, painter, draughtsman and writer (1883-1931)">Theo van Doesburg</span></a>
</bdi>
1924
<i>De Stijl</i>. [deel] <i>2. 1921_1932. Complete Reprint 1968</i>. Amsterdam: Athenaeum, Den Haag: Bert Bakker, Amsterdam: Polak &amp; Van Gennep, 1968, p. 427.