MSA Academic Advancement Institute & Alferez, M. S. (2005). MSA practice test for civil service exam: Professional and sub-professional levels (Year 2005 ed.). MSA Academic Advancement Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMSA Academic Advancement Institute और Merle S. Alferez. MSA Practice Test for Civil Service Exam: Professional and Sub-professional Levels. Year 2005 ed. Quezon City: MSA Academic Advancement Institute, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMSA Academic Advancement Institute और Merle S. Alferez. MSA Practice Test for Civil Service Exam: Professional and Sub-professional Levels. Year 2005 ed. MSA Academic Advancement Institute, 2005.
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