APA (7th ed.) Citation

Great Britain. Anno regni Georgii III. Regis Magnae Britanniae, Franciae, & Hiberniae, quarto: At the Parliament begun and holden at Westminster, the nineteenth day of May, anno Dom. 1761, in the first 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 fifteenth day of November 1763, being the third session of the twelfth Parliament of Great-Britain.

Chicago Style (17th ed.) Citation

Great Britain. Anno Regni Georgii III. Regis Magnae Britanniae, Franciae, & Hiberniae, Quarto: At the Parliament Begun and Holden at Westminster, the Nineteenth Day of May, Anno Dom. 1761, in the First 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 Fifteenth Day of November 1763, Being the Third Session of the Twelfth Parliament of Great-Britain.

MLA (9th ed.) Citation

Great Britain. Anno Regni Georgii III. Regis Magnae Britanniae, Franciae, & Hiberniae, Quarto: At the Parliament Begun and Holden at Westminster, the Nineteenth Day of May, Anno Dom. 1761, in the First 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 Fifteenth Day of November 1763, Being the Third Session of the Twelfth Parliament of Great-Britain.

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