Estes, R. J., & Estes, R. J. (2019). The Social Progress of Nations Revisited, 1970-2020: 50 Years of Development Challenges and Accomplishments (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-15907-8
Παραπομπή σε μορφή Chicago (17η εκδ.)Estes, Richard J., και Richard J. Estes. The Social Progress of Nations Revisited, 1970-2020: 50 Years of Development Challenges and Accomplishments. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-15907-8.
Παραπομπή σε μορφή MLA (8th εκδ.)Estes, Richard J., και Richard J. Estes. The Social Progress of Nations Revisited, 1970-2020: 50 Years of Development Challenges and Accomplishments. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-15907-8.
