Education, N. C. W. C. B. o. (1921). Laws and Regulations Relative to Certification of Teachers. Washington, D.C..
Chicago-стиль цитированияEducation, National Catholic Welfare Council.; Bureau of. Laws and Regulations Relative to Certification of Teachers. Washington, D.C., 1921.
MLA-цитированиеEducation, National Catholic Welfare Council.; Bureau of. Laws and Regulations Relative to Certification of Teachers. Washington, D.C., 1921.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.