- by Steven Pinker
User's Guide to the Early Language and Literacy Classroom Observation Tool, Pre-K (ELLCO Pre-K)Mar 5 2008by Miriam Smith Ed.D. and Joanne Brady M.Ed.
- by Scott McLaughlin
- by Elizabeth Bates and Inge Bretherton
- by Roberta Michnick Golinkoff and Kathy Hirsh-Pasek
- by Alison Porcelli and Cheryl Tyler