Betano, A. G. A diagnosis of college freshmen's difficulties in operations with signed numbers and laws of exponents.
Lua i Stíl Chicago (17ú heag.)Betano, Aurora Gadiano. A Diagnosis of College Freshmen's Difficulties in Operations with Signed Numbers and Laws of Exponents. Quezon City, 1983.
Lua MLA (9ú heag.)Betano, Aurora Gadiano. A Diagnosis of College Freshmen's Difficulties in Operations with Signed Numbers and Laws of Exponents.
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