Obel, P. O. (2010). The impact of voluntary HIV and AIDS counselling and testing on the knowledge, attitudes and sexual behaviour of the deaf in Nairobi Province, Kenya. Daystar Univ..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Obel, Patrick O. The Impact of Voluntary HIV and AIDS Counselling and Testing on the Knowledge, Attitudes and Sexual Behaviour of the Deaf in Nairobi Province, Kenya. Nairobi: Daystar Univ., 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Obel, Patrick O. The Impact of Voluntary HIV and AIDS Counselling and Testing on the Knowledge, Attitudes and Sexual Behaviour of the Deaf in Nairobi Province, Kenya. Daystar Univ., 2010.
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