APA

Hatton T. J., Williamson J. G., .What drove the mass migrations from Europe in the late nineteenth century?. : .

Chicago

Hatton T J, Williamson J G, .What drove the mass migrations from Europe in the late nineteenth century?. : .

Harvard

Hatton T. J., Williamson J. G., .What drove the mass migrations from Europe in the late nineteenth century?. : .

MLA

Hatton T J, Williamson J G, .: . .