Freund, F. T. (2007). Pre-earthquake signals – Part I: Deviatoric stresses turn rocks into a source of electric currents. Copernicus Publications.
استشهاد بنمط شيكاغوFreund, F. T. Pre-earthquake Signals – Part I: Deviatoric Stresses Turn Rocks Into a Source of Electric Currents. Copernicus Publications, 2007.
MLA استشهادFreund, F. T. Pre-earthquake Signals – Part I: Deviatoric Stresses Turn Rocks Into a Source of Electric Currents. Copernicus Publications, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.