(1977). Remedial education: Programmes and progress ; reader / edited and introduced by Paul Widlake for the National Association for Remedial Education from the journal Remedial Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Remedial Education: Programmes and Progress ; Reader / Edited and Introduced by Paul Widlake for the National Association for Remedial Education from the Journal Remedial Education. 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Remedial Education: Programmes and Progress ; Reader / Edited and Introduced by Paul Widlake for the National Association for Remedial Education from the Journal Remedial Education. 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.