Foundations of Sleep HealthMichael Klag, Donna Petersen, Xavier Nieto · First published 2020Open the Tome
Infant and Toddler Development and Responsive Program PlanningDonna S. Wittmer, Sandy Petersen · First published 2005 · Latest edition 2013Open the Tome
Endless opportunities for infant and toddler curriculumSandra H. Petersen, Sandra Petersen, Donna Wittmer · First published 2008Open the Tome