Cita APA

Davis, W. M., & Johnson, D. W. (1909). Geographical essays. Ginn and company.

Citación estilo Chicago

Davis, William Morris, and Douglas Wilson Johnson. Geographical Essays. Boston, New York: Ginn and company, 1909.

Cita MLA

Davis, William Morris, and Douglas Wilson Johnson. Geographical Essays. Ginn and company, 1909.