Alferez, M. S. (1998). Proficiency test 1 for incoming high school students. MSA Math Tutoring Center.
Cita Chicago (17th ed.)Alferez, Merle S. Proficiency Test 1 for Incoming High School Students. Quezon City: MSA Math Tutoring Center, 1998.
Cita MLA (9th ed.)Alferez, Merle S. Proficiency Test 1 for Incoming High School Students. MSA Math Tutoring Center, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.