1. American Psychological Association. (1968). Ethical standard for developmental psychologists: Statement of division of developmental psychology of the American Psychological Association. Newsletter, 1–3.
2. The classroom observer;Boehm,1997
3. The very hungry caterpillar;Carle,1969
4. Evaluating the impact of federally funded public library youth programs;Chelton,1990
5. Public opinion about the roles of the public library in the community;D'Elia;Public Libraries,1994