Isworo, C. E. (2017). Practice Teachers Possible Solutions to Students Problems of Speaking during PPL in Junior High Schools. Universitas Sanata Dharma.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Isworo, Chezia Eufresia. Practice Teachers Possible Solutions to Students Problems of Speaking During PPL in Junior High Schools. Universitas Sanata Dharma, 2017.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Isworo, Chezia Eufresia. Practice Teachers Possible Solutions to Students Problems of Speaking During PPL in Junior High Schools. Universitas Sanata Dharma, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.