توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Lacas, C. R., Jr, & Relao, E. K. A. (2015). An Exploratory descriptive study on the filipino street children's production of english vowel sounds. College of Arts and Letters, University of the Philippines Diliman.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Lacas, Cornelio R., Jr, و Eileen Kae A. Relao. An Exploratory Descriptive Study on the Filipino Street Children's Production of English Vowel Sounds. Quezon City: College of Arts and Letters, University of the Philippines Diliman, 2015.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Lacas, Cornelio R., Jr, و Eileen Kae A. Relao. An Exploratory Descriptive Study on the Filipino Street Children's Production of English Vowel Sounds. College of Arts and Letters, University of the Philippines Diliman, 2015.