Lua APA (7ú heag.)

Cava, R. (1990). Dealing with difficult people. Piatkus.

Lua i Stíl Chicago (17ú heag.)

Cava, Roberta. Dealing with Difficult People. London: Piatkus, 1990.

Lua MLA (9ú heag.)

Cava, Roberta. Dealing with Difficult People. Piatkus, 1990.

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