Van Gogh Museum, Amsterdam: To Theo van Gogh. Arles, Thursday, 17 January 1889.. [dostęp 2011-03-29]. Cytat: "And if he’s unhappy with the exchange he made with me he can take back his little canvas of Martinique and his portrait that he sent me from Brittany, giving me back for his part both my portrait and my two canvases of sunflowers which he took in Paris."(ang.).
Van Gogh Museum, Amsterdam: To Emile Bernard. Arles, on or about Tuesday, 21 August 1888. [dostęp 2011-03-29]. Cytat: "I’m thinking of decorating my studio with half a dozen paintings of Sunflowers. A decoration in which harsh or broken yellows will burst against various BLUE backgrounds, from the palest Veronese to royal blue, framed with thin laths painted in orange lead."(ang.).
Van Gogh Museum, Amsterdam: To Theo van Gogh. Arles, Tuesday, 21 or Wednesday, 22 August 1888.. [dostęp 2011-03-29]. Cytat: "I have 3 canvases on the go, 1) 3 large flowers in a green vase, light background (no. 15 canvas), 2) 3 flowers, one flower that’s gone to seed and lost its petals and a bud on a royal blue background (no. 25 canvas), 3) twelve flowers and buds in a yellow vase (no. 30 canvas). So the last one is light on light, and will be the best, I hope. I’ll probably not stop there. In the hope of living in a studio of our own with Gauguin, I’d like to do a decoration for the studio. Nothing but large Sunflowers."(ang.).
Van Gogh Museum, Amsterdam: To Theo van Gogh. Arles, Thursday, 23 or Friday, 24 August 1888.. [dostęp 2011-03-29]. Cytat: "I’m now on the fourth painting of sunflowers. This fourth one is a bouquet of 14 flowers and is on a yellow background, like a still life of quinces and lemons that I did back then."(ang.).
