PENROSE, B. (1992). Presenting facts and figures: Study notes.-- ed.1. Universitas Terbuka and Depdikbud.
Chicago-viite (17. p.)PENROSE, Brenda. Presenting Facts and Figures: Study Notes.-- Ed.1. Jakarta: Universitas Terbuka and Depdikbud, 1992.
MLA-viite (9. p.)PENROSE, Brenda. Presenting Facts and Figures: Study Notes.-- Ed.1. Universitas Terbuka and Depdikbud, 1992.
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