Citazione Stile APA (7a Edizione)

PENROSE, B. (1992). Presenting facts and figures: Study notes.-- ed.1. Universitas Terbuka and Depdikbud.

Citazione stile Chigago Style (17a edizione)

PENROSE, Brenda. Presenting Facts and Figures: Study Notes.-- Ed.1. Jakarta: Universitas Terbuka and Depdikbud, 1992.

Citatione MLA (9a ed.)

PENROSE, Brenda. Presenting Facts and Figures: Study Notes.-- Ed.1. Universitas Terbuka and Depdikbud, 1992.