1a. pte: Human development: an integrated study of the life span. p.2 2a. pte: The Beginnings of human life. p.84 3a. pte: Infancy: The first two years of life. p.216 4a. pte: Early Childhood. p.302 5a. pte: Middle childhood. p.462 6a. pte: Adolescence. p.574
