Cita APA (7a ed.)

Duke, D. C. (1994). Night Owl: Maryland's After-Hours Reference Service.

Cita Chicago Style (17a ed.)

Duke, Deborah C. Night Owl: Maryland's After-Hours Reference Service. 1994.

Cita MLA (9a ed.)

Duke, Deborah C. Night Owl: Maryland's After-Hours Reference Service. 1994.