Tipanark, P. (1991). Teaching Competency Needs of Vocational Agriculture Teachers as Perceived by Vocational Agriculture Teachers and Administrators in Thailand.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tipanark, Peerapong. Teaching Competency Needs of Vocational Agriculture Teachers as Perceived by Vocational Agriculture Teachers and Administrators in Thailand. 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tipanark, Peerapong. Teaching Competency Needs of Vocational Agriculture Teachers as Perceived by Vocational Agriculture Teachers and Administrators in Thailand. 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.