APA Edition Citation

Open University, Technology Foundation Course Team. (1971). Using letters instead of numbers. Unit 4 by Michael Hussey. Open Uty press.

Chicago Edition Citation

Open University, Technology Foundation Course Team. Using Letters Instead of Numbers. Unit 4 by Michael Hussey. Open Uty press, 1971.

MLA Edition Citation

Open University, Technology Foundation Course Team. Using Letters Instead of Numbers. Unit 4 by Michael Hussey. Open Uty press, 1971.

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