MLA

Doppelmayr, Johann Gabriel, 1677-1750. Motus cometarum in hemisphaerio australi : qui intra an[n]um 1530 et 1740 cum duabus stellis novis, nostra tempore visis, à celeberrimis astronomis observati, geometrice nunc descripti / à Ioh. Gabr. Doppelmaiero .... BRBL_00271. 1740. https://collections.library.yale.edu/catalog/15827167.

APA, 6th edition

Doppelmayr, Johann Gabriel, 1677-1750. (["BRBL_00271"])(1740)[Motus cometarum in hemisphaerio australi : qui intra an[n]um 1530 et 1740 cum duabus stellis novis, nostra tempore visis, à celeberrimis astronomis observati, geometrice nunc descripti / à Ioh. Gabr. Doppelmaiero ...]. https://collections.library.yale.edu/catalog/15827167.