[full article and abstract in Lithuanian; abstract in English] This article analyses the citations from the ethnographic study “Der Preuſche Littauer” (1744; later cited as PL) by the Prussian priest Theodor Lepner which appear in the work of Simonas Daukantas (1793–1864) “BUDĄ Senowęs–Lëtuwiû Kalnienû ir Ƶámajtiû ĩszraszę […] Jokyb’s Łaukys” (later cited as “Būdas”). The object of this article is the 31 references to PL in S. Daukantas’s “Būdas”. Looking at the previous scholarly research on “Būdas” and its sources along with the subsequent questions they pose, this article formulates a goal to research the methods with which PL source citations were presented in Būdas. This goal was completed by setting and meeting the following tasks: 1)...