APA (7th ed.) Citation

Whitfeld, R. A brief relation of the just and undeniable title of Alphonso the Sixth, King of Portugal, now reigning 1661: Warranted by the fundamental laws of that nation.

Chicago Style (17th ed.) Citation

Whitfeld, Raphe. A Brief Relation of the Just and Undeniable Title of Alphonso the Sixth, King of Portugal, Now Reigning 1661: Warranted by the Fundamental Laws of That Nation.

MLA (9th ed.) Citation

Whitfeld, Raphe. A Brief Relation of the Just and Undeniable Title of Alphonso the Sixth, King of Portugal, Now Reigning 1661: Warranted by the Fundamental Laws of That Nation.

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