Leopoldo, G. D., & Capangpangan, M. B. (2007). Supercritical fluid extraction and chromatographic analysis of polynuclear aromatic hydrocarbons in Iligan City and Cagayan de Oro City street dusts: A method development and application study. The Mindanao Forum: official journal of the MSU-Iligan Institute of Technology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Leopoldo, Girlie D., و Mario B. Capangpangan. "Supercritical Fluid Extraction and Chromatographic Analysis of Polynuclear Aromatic Hydrocarbons in Iligan City and Cagayan De Oro City Street Dusts: A Method Development and Application Study." The Mindanao Forum: Official Journal of the MSU-Iligan Institute of Technology 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Leopoldo, Girlie D., و Mario B. Capangpangan. "Supercritical Fluid Extraction and Chromatographic Analysis of Polynuclear Aromatic Hydrocarbons in Iligan City and Cagayan De Oro City Street Dusts: A Method Development and Application Study." The Mindanao Forum: Official Journal of the MSU-Iligan Institute of Technology, 2007.