Mariano, M. L. (2004). Mental math. UP Open University, Office of Academic Support & Instructional Services.
Citace podle Chicago (17th ed.)Mariano, Ma. Luisa. Mental Math. Quezon City: UP Open University, Office of Academic Support & Instructional Services, 2004.
Citace podle MLA (9th ed.)Mariano, Ma. Luisa. Mental Math. UP Open University, Office of Academic Support & Instructional Services, 2004.
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