Lua APA (7ú heag.)

Universiti Putra Malaysia. (1997). UPM research report. The Research Unit, Universiti Putra Malaysia.

Lua i Stíl Chicago (17ú heag.)

Universiti Putra Malaysia. UPM Research Report. Serdang: The Research Unit, Universiti Putra Malaysia, 1997.

Lua MLA (8ú heag.)

Universiti Putra Malaysia. UPM Research Report. The Research Unit, Universiti Putra Malaysia, 1997.

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