APA (7th ed.) Citation

Longleat House (Warminster, Wiltshire). Archives, Harley, R., Harley, E., Oxford, E. H., & Portland, M. C. H. H. B. (1971). The Portland papers, [16th-18th Centuries]. Micro Methods.

Chicago Style (17th ed.) Citation

Longleat House (Warminster, Wiltshire). Archives, Robert Harley, Edward Harley, Edward Harley Oxford, and Margaret Cavendish Holles Harley Bentinck Portland. The Portland Papers, [16th-18th Centuries]. Wakefield: Micro Methods, 1971.

MLA (9th ed.) Citation

Longleat House (Warminster, Wiltshire). Archives, et al. The Portland Papers, [16th-18th Centuries]. Micro Methods, 1971.