Ducatus Silesiae ... Per Tob. Maier.
MLA
Ducatus Silesiae ... Per Tob. Maier. Homannianorum Heredum, 1749. https://collections.library.yale.edu/catalog/15483004.
APA, 6th edition
Ducatus Silesiae ... Per Tob. Maier. (1749). [Maps]. Homannianorum Heredum, https://collections.library.yale.edu/catalog/15483004.