Dyfyniad APA

Nelkon, M., & Ogborn, J. (1970). Advanced level practical physics (3rd ed.). ELBS.

Dyfyniad Arddull Chicago

Nelkon, M., and J.M Ogborn. Advanced Level Practical Physics. 3rd ed. London: ELBS, 1970.

Dyfyniad MLA

Nelkon, M., and J.M Ogborn. Advanced Level Practical Physics. 3rd ed. ELBS, 1970.

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