A Catalogue of books to be sold by auction : on [space] the [space] of this instant April, 1690, to the booksellers of London and Westminster only, at the Crown Tavern in West-Smithfield, exactly at nine of the clock in the morning, there being several valuable books to be sold
MLA
A Catalogue of Books to Be Sold by Auction : on [Space] the [Space] of This Instant April, 1690, to the Booksellers of London and Westminster Only, at the Crown Tavern in West-Smithfield, Exactly at Nine of the Clock in the Morning, There Being Several Valuable Books to Be Sold. s.n., 1690. https://collections.library.yale.edu/catalog/2055073.
APA, 6th edition
A Catalogue of books to be sold by auction : on [space] the [space] of this instant April, 1690, to the booksellers of London and Westminster only, at the Crown Tavern in West-Smithfield, exactly at nine of the clock in the morning, there being several valuable books to be sold. (1690). [Early works to 1800, Booksellers' catalogs, Brit Tracts]. s.n. https://collections.library.yale.edu/catalog/2055073.
