Παραπομπή σε μορφή APA (7η εκδ.)

ebrary, Inc, & Williams, F. D. (1989). The Northwest Ordinance: Essays on its formulation, provisions, and legacy. Michigan State University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

ebrary, Inc, και Frederick D. Williams. The Northwest Ordinance: Essays on Its Formulation, Provisions, and Legacy. East Lansing, Mich.: Michigan State University Press, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

ebrary, Inc, και Frederick D. Williams. The Northwest Ordinance: Essays on Its Formulation, Provisions, and Legacy. Michigan State University Press, 1989.