Cita APA (7th ed.)

Gregory, D. (1989). Horizons in human geography. Macmillan.

Cita Chicago (17th ed.)

Gregory, Derek. Horizons in Human Geography. London: Macmillan, 1989.

Cita MLA (9th ed.)

Gregory, Derek. Horizons in Human Geography. Macmillan, 1989.