1. Attachments beyond infancy;Ainsworth;The American Psychologist,1989
2. Pets, families, and the life course;Albert;Journal of Marriage and Family,1988
3. Diagnostic and statistical manual of mental health disorders: DSM-5;American Psychiatric Association,2013
4. American Veterinary Medical Association. (2010). Dog bite prevention. Retrieved from https://ebusiness.avma.org/EBusiness50/files/productdownloads/dog_bite_brochure.pdf
5. U.S. pet ownership & demographics sourcebook;American Veterinary Medical Association,2012