APA (7th ed.) Citation

Brand, J., Beilby, R., & Fenwick, J. Letters of the Rev. John Brand to Ralph Beilby, of Newcastle upon Tyne.

Chicago Style (17th ed.) Citation

Brand, John, Ralph Beilby, and John Fenwick. Letters of the Rev. John Brand to Ralph Beilby, of Newcastle upon Tyne.

MLA (9th ed.) Citation

Brand, John, et al. Letters of the Rev. John Brand to Ralph Beilby, of Newcastle upon Tyne.