Schielke, T. (2018). Dark Sky - Less light is more: Astronomers, environmental associations and manufacturers have begun to cooperate for a new awareness of darkness "Dark Sky" / von Thomas Schielke. Topos.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Schielke, Thomas. "Dark Sky - Less Light Is More: Astronomers, Environmental Associations and Manufacturers Have Begun to Cooperate for a New Awareness of Darkness "Dark Sky" / Von Thomas Schielke." Topos 2018.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Schielke, Thomas. "Dark Sky - Less Light Is More: Astronomers, Environmental Associations and Manufacturers Have Begun to Cooperate for a New Awareness of Darkness "Dark Sky" / Von Thomas Schielke." Topos, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.