Não informado. (2002). California parent teacher. National Congress of Parents and Teachers.
Citação do estilo Chicago (17ª ed.)Não informado. California Parent Teacher. Los Angeles, Calif: National Congress of Parents and Teachers, 2002.
Citação MLA (8ª ed.)Não informado. California Parent Teacher. National Congress of Parents and Teachers, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.