- ISBN: 978-3-659-40914-1

- ISBN: 978-3-659-40407-8

- ISBN: 978-3-659-55186-4

From Psychological and administrative perspective

- ISBN: 978-3-8484-8251-1

Teachers experiences of the incorporation of Environmental Education into schools

- ISBN: 978-3-659-64973-8

A Study of Four Cognitive Structures in a Sample of Colombian Children and the Implications for Education

- ISBN: 978-3-659-32366-9

- ISBN: 978-3-659-41235-6

- ISBN: 978-3-659-36930-8

- ISBN: 978-3-659-67310-8

Knowledge of and attitude towards Albinism

- ISBN: 978-3-659-40888-5