APA
Richard W. Bulliet, Steven W. Hirsch L. L. J. P. K. C. D. R. H. D. N., . (2019). The Earth and Its People A Global History. Boston, USA: Cengage.
Chicago
Richard W. Bulliet, Steven W. Hirsch Lyman L Johnson Pamela Kyle Crossley Daniel R Headrick David Northrup, . 2019. The Earth and Its People A Global History. Boston, USA: Cengage.
Harvard
Richard W. Bulliet, Steven W. Hirsch L. L. J. P. K. C. D. R. H. D. N., . (2019). The Earth and Its People A Global History. Boston, USA: Cengage.
MLA
Richard W. Bulliet, Steven W. Hirsch Lyman L Johnson Pamela Kyle Crossley Daniel R Headrick David Northrup, . The Earth and Its People A Global History. Boston, USA: Cengage. 2019.