| صفحة = [https://archive.org/details/historyofscience00maso/page/550 550]}}</ref><ref>{{استشهاد ويب |مسار=https://www.nobelprize.org/nobel_prizesprizes/physics/laureates/1921/summary/ |عنوان=The Nobel Prize in Physics: 1921 |مؤلف=<!--Not stated--> |تاريخ=2017 |موقع=Nobelprize.org |ناشر=Nobel Media AB |تاريخ الوصول=December 13, 2017 |اقتباس=For his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect.| مسار أرشيف = https://web.archive.org/web/20180703190346/https://www.nobelprize.org/nobel_prizes/physics/laureates/1921/ | تاريخ أرشيف = 03 يوليو 2018 }}</ref><ref>{{استشهاد بكتاب |الأخير1=McQuarrie |الأول1=Donald A. |الأخير2=Simon |الأول2=John D. |عنوان=Physical chemistry: a molecular approach |تاريخ=1997 |ناشر=Univ. Science Books |مكان=Sausalito, Calif. |isbn=978-0-935702-99-6 |إصدار=rev. }}</ref>
