Penn, Helen. Quality in early childhood services : an international perspective / Helen Penn. - England : McGraw-Hill, Open University Press, 2011. - xi, 219 p. : ill. ; 23 cm. Includes bibliographical references and index. ISBN: 9780335228782 (pbk.) RM110.46 033522878X (pbk.) 9780335228775 (hbk.) 0335228771 (hbk.) Subjects--Topical Terms: Early childhood education--Standards.Early childhood education.