Gaya APA

Zhang, X. et al (2009). Estimating the impact of extreme events on crude oil price: An EMD-based event analysis method (Energy Economics). Hongkong: Elsevier.

Gaya MLA

Zhang, Xun. et al. "Estimating the impact of extreme events on crude oil price: An EMD-based event analysis method". Energy Economics Hongkong: Elsevier, 2009. Article.