Lua APA (7ú heag.)

British Standards Institution. (1970). Method for Rockwell superficial hardness test (N and T scales). British Standards Institution.

Lua i Stíl Chicago (17ú heag.)

British Standards Institution. Method for Rockwell Superficial Hardness Test (N and T Scales). London: British Standards Institution, 1970.

Lua MLA (8ú heag.)

British Standards Institution. Method for Rockwell Superficial Hardness Test (N and T Scales). British Standards Institution, 1970.

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