MLA

Homann Erben (Firm), Trenckmann, Johannes Paulus. Comitatvs Schoenburgensis [cartographic material] : in quo celsissimorum comitum de Schoenburg regiones ad circulum Saxoniae superiorem Imperii Romano-Germanici pertinentes et in Marchionatu Misniae sitae, subfeuda porro Bohemico-Imperialia, nempe Dynasti. a. 1760. https://collections.library.yale.edu/catalog/2065702.

APA, 6th edition

Homann Erben (Firm), & Trenckmann, Johannes Paulus. (a. 1760)[Comitatvs Schoenburgensis [cartographic material] : in quo celsissimorum comitum de Schoenburg regiones ad circulum Saxoniae superiorem Imperii Romano-Germanici pertinentes et in Marchionatu Misniae sitae, subfeuda porro Bohemico-Imperialia, nempe Dynasti]. https://collections.library.yale.edu/catalog/2065702.