APA (7th ed.) Citation

Longleat House (Warminster, England), Somerset, E. S., & Somerset, W. S. (1971). Seymour papers. Micro Methods Ltd..

Chicago Style (17th ed.) Citation

Longleat House (Warminster, England), Edward Seymour Somerset, and William Seymour Somerset. Seymour Papers. East Ardsley, Wakefield, West Yorkshire: Micro Methods Ltd., 1971.

MLA (8th ed.) Citation

Longleat House (Warminster, England), et al. Seymour Papers. Micro Methods Ltd., 1971.