Lua APA (7ú heag.)

Hobbs, G. M. (1972). Practical mathematics (3rd.ed.). American technical.

Lua i Stíl Chicago (17ú heag.)

Hobbs, Glen M. Practical Mathematics. 3rd.ed. Illinois: American technical, 1972.

Lua MLA (9ú heag.)

Hobbs, Glen M. Practical Mathematics. 3rd.ed. American technical, 1972.

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