File:Pablo Picasso, 1912-13, Guitare (Guitar), oil and charcoal on canvas, 72.4 x 60 cm, National Museum of Art, Architecture and Design, Oslo, Norway.jpg

Published in 1914
Gustave Coquiot, Cubistes, futuristes, passéistes, essai sur la jeune peinture et la jeune sculpture. Published 1914 by Librairie Ollendorff in Paris (written in French).