Lua APA (7ú heag.)

ASHWORTH, A., & ASHWORTH, A. (1996). Pre-contract Studies. Addison Wesley Longman.

Lua i Stíl Chicago (17ú heag.)

ASHWORTH, Allan, agus Allan ASHWORTH. Pre-contract Studies. Addison Wesley Longman, 1996.

Lua MLA (8ú heag.)

ASHWORTH, Allan, agus Allan ASHWORTH. Pre-contract Studies. Addison Wesley Longman, 1996.

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