Não informado. (1976). Journal of Family History. National Council on Family Relations.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Family History. Greenwich, Conn: National Council on Family Relations, 1976.
Citação MLA (8ª ed.)Não informado. Journal of Family History. National Council on Family Relations, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.