APA (7th ed.) Citation

Library of Congress & Vollbehr, O. H. F. (1929). Vollbehr collection of incunabula. U.S. GPO.

Chicago Style (17th ed.) Citation

Library of Congress and Otto H. F. Vollbehr. Vollbehr Collection of Incunabula. Washington: U.S. GPO, 1929.

MLA (9th ed.) Citation

Library of Congress and Otto H. F. Vollbehr. Vollbehr Collection of Incunabula. U.S. GPO, 1929.