Lua APA (7ú heag.)

STAFFORD L W T. (1981). BUSINESS MATHEMATICS (2ND.). MACDONALD & EVANS.

Lua i Stíl Chicago (17ú heag.)

STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. LONDON: MACDONALD & EVANS, 1981.

Lua MLA (9ú heag.)

STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. MACDONALD & EVANS, 1981.

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