Levin, Jeffrey S (1991). "The factor structure of the Pregnancy Anxiety Scale". Journal of Health & Social Behavior. 32 (4): 368–381. doi:10.2307/2137104. JSTOR2137104. PMID1765627.
Levin, Jeffrey S (1991). "The factor structure of the Pregnancy Anxiety Scale". Journal of Health & Social Behavior. 32 (4): 368–381. doi:10.2307/2137104. JSTOR2137104. PMID1765627.
Levin, Jeffrey S (1991). "The factor structure of the Pregnancy Anxiety Scale". Journal of Health & Social Behavior. 32 (4): 368–381. doi:10.2307/2137104. JSTOR2137104. PMID1765627.