Song, X., Massey, C. G., Rolf, K. A., Ferrie, J. P., Rothbaum, J. L., & Xie, Y. (2020). Long-term decline in intergenerational mobility in the United States since the 1850s. Proc Natl Acad Sci U S A.
استشهاد بنمط شيكاغوSong, Xi, Catherine G. Massey, Karen A. Rolf, Joseph P. Ferrie, Jonathan L. Rothbaum, و Yu Xie. "Long-term Decline in Intergenerational Mobility in the United States Since the 1850s." Proc Natl Acad Sci U S A 2020.
MLA استشهادSong, Xi, et al. "Long-term Decline in Intergenerational Mobility in the United States Since the 1850s." Proc Natl Acad Sci U S A 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.