Bulliet, R. W., Crossley, P. K., Headrick, D. R., Hirsch, S. W., Johnson, L. L., & Northrup, D. (2015). The earth and its peoples: A global history (Sixth edition, advantage edition, student edition.). Cengage Learning.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bulliet, Richard W., Pamela Kyle Crossley, Daniel R. Headrick, Steven W. Hirsch, Lyman L. Johnson, και David Northrup. The Earth and Its Peoples: A Global History. Sixth edition, advantage edition, student edition. Stamford, CT: Cengage Learning, 2015.
Παραπομπή σε μορφή MLA (9th εκδ.)Bulliet, Richard W., et al. The Earth and Its Peoples: A Global History. Sixth edition, advantage edition, student edition. Cengage Learning, 2015.
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