APA (7th ed.) Citation

Great Britain & Gale (Firm). Anno Regni Georgii III. Regis Magnæ Britanniæ, Franciæ, & Hiberniæ, decimo: At the Parliament begun and holden at Westminster, the tenth day of May, Anno Dom. 1768, in the eighth year of the Reign of our Sovereign Lord George the third, by the grace of God, of Great Britain, France, and Ireland, king, defender of the faith, &c. And from thence continued, by several prorogations, to the ninth day of January, 1770; being the third session of the thirteenth Parliament of Great Britain.

Chicago Style (17th ed.) Citation

Great Britain and Gale (Firm). Anno Regni Georgii III. Regis Magnæ Britanniæ, Franciæ, & Hiberniæ, Decimo: At the Parliament Begun and Holden at Westminster, the Tenth Day of May, Anno Dom. 1768, in the Eighth Year of the Reign of Our Sovereign Lord George the Third, by the Grace of God, of Great Britain, France, and Ireland, King, Defender of the Faith, &c. And from Thence Continued, by Several Prorogations, to the Ninth Day of January, 1770; Being the Third Session of the Thirteenth Parliament of Great Britain.

MLA (9th ed.) Citation

Great Britain and Gale (Firm). Anno Regni Georgii III. Regis Magnæ Britanniæ, Franciæ, & Hiberniæ, Decimo: At the Parliament Begun and Holden at Westminster, the Tenth Day of May, Anno Dom. 1768, in the Eighth Year of the Reign of Our Sovereign Lord George the Third, by the Grace of God, of Great Britain, France, and Ireland, King, Defender of the Faith, &c. And from Thence Continued, by Several Prorogations, to the Ninth Day of January, 1770; Being the Third Session of the Thirteenth Parliament of Great Britain.

Warning: These citations may not always be 100% accurate.