APA (7th ed.) Zitazioa
(1987). Exercises and test papers for certificate arithmetic. Heinemann Educational publ..
Chicago Style (17th ed.) Zitazioa
Exercises and Test Papers for Certificate Arithmetic. London: Heinemann Educational publ., 1987.
MLA (9th ed.) Zitazioa
Exercises and Test Papers for Certificate Arithmetic. Heinemann Educational publ., 1987.
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