Παραπομπή σε μορφή APA (7η εκδ.)

Education, N. C. W. C. B. o. (1921). Laws and Regulations Relative to Certification of Teachers. Washington, D.C..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Education, National Catholic Welfare Council.; Bureau of. Laws and Regulations Relative to Certification of Teachers. Washington, D.C., 1921.

Παραπομπή σε μορφή MLA (8th εκδ.)

Education, National Catholic Welfare Council.; Bureau of. Laws and Regulations Relative to Certification of Teachers. Washington, D.C., 1921.