Sahlin, Gunnar. „The Change of the Swedish Bookproducing System in the Second Part of the Eighteenth-Century“. Knygotyra 27, no. 20 (gruodžio 15, 1993): 15–22. žiūrėta balandžio 2, 2026. https://www.journals.vu.lt/knygotyra/article/view/36498.