遠期匯率,遠期匯率結合歷史數據可以準確地預測未來即期匯率。 Madura, Jeff. International Financial Management: Abridged 8th Edition. Mason, OH: Thomson South-Western. 2007. ISBN 978-0-324-36563-4
尼古丁依賴(PDF)存档于2016-03-27). Ng, M; Freeman, MK; Fleming, TD; Robinson, M; Dwyer-Lindgren, L; Thomson, B; Wollum, A; Sanman, E; Wulf, S. Smoking prevalence and cigarette consumption