Não informado. (1970). Planning & Changing. Illinois State University, Department of Educational Administration.
Citação do estilo Chicago (17ª ed.)Não informado. Planning & Changing. Normal, Ill: Illinois State University, Department of Educational Administration, 1970.
Citação MLA (8ª ed.)Não informado. Planning & Changing. Illinois State University, Department of Educational Administration, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.