1. ( 1986). Parenting Stress Index. Charlottesville, VA: Pediatric Psychology Press.
2. ( 1989). Child Behavior Checklist. Burlington, Vermont: University of Vermont.
3. Infant Sleep, Nighttime Relationships, and Attachment
4. ( 1984). Infant Characteristics Questionnaire, Revised. Bloomington: Indiana University.
5. ( 1993). Bayley Scales of Infant Development. San Antonio, TX: Psychological Corp.