Cita APA (7a ed.)

Willard, L. C. (1991). Brittle Books: What Order of Preservation?

Cita Chicago Style (17a ed.)

Willard, Louis Charles. Brittle Books: What Order of Preservation? 1991.

Cita MLA (9a ed.)

Willard, Louis Charles. Brittle Books: What Order of Preservation? 1991.