South Africa. Committee for the Investigation of the Injudicious Release of Hearing Aids to the Public of South Africa & South Africa. Dept. of Health. (1970). Report of the Committee for the investigation of the injudicious release of hearing aids to the public of South Africa. Govt. Printer.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)South Africa. Committee for the Investigation of the Injudicious Release of Hearing Aids to the Public of South Africa و South Africa. Dept. of Health. Report of the Committee for the Investigation of the Injudicious Release of Hearing Aids to the Public of South Africa. Pretoria: Govt. Printer, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)South Africa. Committee for the Investigation of the Injudicious Release of Hearing Aids to the Public of South Africa و South Africa. Dept. of Health. Report of the Committee for the Investigation of the Injudicious Release of Hearing Aids to the Public of South Africa. Govt. Printer, 1970.