The essentials of world geography

MLA

Unstead, J. F, and E. G. R Taylor. The Essentials of World Geography. 10th ed. London: George Philip, 1927.

APA

Unstead, J. F, & Taylor, E. G. R. (1927). The essentials of world geography. 10th ed. London: George Philip.

Chicago

Unstead, J. F., and E. G. R Taylor. The Essentials of World Geography. 10th ed. London: George Philip, 1927.