Wirawan, Y. G. (1986). The relationship of parental practice to intelligence and school achievement of junior high school students in Indonesia. The University of Michigan.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wirawan, Yapsir Gandhi. The Relationship of Parental Practice to Intelligence and School Achievement of Junior High School Students in Indonesia. Ann Arbor, Michigan: The University of Michigan, 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wirawan, Yapsir Gandhi. The Relationship of Parental Practice to Intelligence and School Achievement of Junior High School Students in Indonesia. The University of Michigan, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.