Thesaurus pauperum ... [etc.].

MLA

John, et al. Thesaurus pauperum ... [etc.]. [Italy], [1450-1499?]

APA

John, Llull, R., Johannes, Arnaldus & Lawrence J. Schoenberg Collection (University of Pennsylvania). (1450). Thesaurus pauperum ... [etc.]. [Italy].

Chicago

John, Ramon Llull, Johannes, Arnaldus and Lawrence J. Schoenberg Collection (University of Pennsylvania). Thesaurus pauperum ... [etc.]. [Italy], [1450-1499?]