Centro Escolar University, Manila. Department of English. (1967). Workbook in English one ([Rev. ed.].). [s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCentro Escolar University, Manila. Department of English. Workbook in English One. [Rev. ed.]. Manila: [s.n, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCentro Escolar University, Manila. Department of English. Workbook in English One. [Rev. ed.]. [s.n, 1967.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.