(19538080), J. P., & (8350056), R. J. I. (2021). The impact of COVID-19-induced lockdowns during spring 2020 on nitrogen dioxide levels over major American counties.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)(19538080), James Poetzscher, و Rima J. Isaifan (8350056). The Impact of COVID-19-induced Lockdowns During Spring 2020 on Nitrogen Dioxide Levels over Major American Counties. 2021.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)(19538080), James Poetzscher, و Rima J. Isaifan (8350056). The Impact of COVID-19-induced Lockdowns During Spring 2020 on Nitrogen Dioxide Levels over Major American Counties. 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.