APA (7th ed.) Citation

Alexander Street (Firm), American Antiquarian Society, Foster, R. F., Foster, D., Foster, A. D., Foster, P., & Foster, L. S. (2011). Foster family papers. Alexander Street.

Chicago Style (17th ed.) Citation

Alexander Street (Firm), American Antiquarian Society, Rebecca Faulkner Foster, Dwight Foster, Alfred Dwight Foster, Pamela Foster, and Lydia Stiles Foster. Foster Family Papers. Alexandria, Va.: Alexander Street, 2011.

MLA (9th ed.) Citation

Alexander Street (Firm), et al. Foster Family Papers. Alexander Street, 2011.