Παραπομπή APA

Bulliet, R. W., ., Crossley, P. K., & Headrick, D. R. (1997). The earth and its peoples: A global history. Boston: Houghton Mifflin.

Παραπομπή Chicago Style

Bulliet, Richard W., , Pamela Kyle Crossley, και Daniel R. Headrick. The Earth and Its Peoples: A Global History. Boston: Houghton Mifflin, 1997.

Παραπομπή MLA

Bulliet, Richard W., , Pamela Kyle Crossley, και Daniel R. Headrick. The Earth and Its Peoples: A Global History. Boston: Houghton Mifflin, 1997.

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