Keegan, Joan; Parva, Mehdi; Finnegan, Mark; Gerson, Andrew; Belden, Michael (2010-04-16). "Addiction in Pregnancy". Journal of Addictive Diseases. 29 (2): 175–191. doi:10.1080/10550881003684723. ISSN1055-0887. PMID20407975.
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.
Madhavanprabhakaran, Girija Kalayil; D’Souza, Melba Sheila; Nairy, Karkada Subrahmanya (2015-01-01). "Prevalence of pregnancy anxiety and associated factors". International Journal of Africa Nursing Sciences (dalam bahasa Inggris). 3: 1–7. doi:10.1016/j.ijans.2015.06.002. ISSN2214-1391.
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.
Keegan, Joan; Parva, Mehdi; Finnegan, Mark; Gerson, Andrew; Belden, Michael (2010-04-16). "Addiction in Pregnancy". Journal of Addictive Diseases. 29 (2): 175–191. doi:10.1080/10550881003684723. ISSN1055-0887. PMID20407975.
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.
Madhavanprabhakaran, Girija Kalayil; D’Souza, Melba Sheila; Nairy, Karkada Subrahmanya (2015-01-01). "Prevalence of pregnancy anxiety and associated factors". International Journal of Africa Nursing Sciences (dalam bahasa Inggris). 3: 1–7. doi:10.1016/j.ijans.2015.06.002. ISSN2214-1391.