Cita APA (7a ed.)

Unstead, J. F., & Gilbert, E. W. (1964). The British Isles (6. ed.). Univ. of London Press.

Cita Chicago Style (17a ed.)

Unstead, John Frederick, y Edmund William Gilbert. The British Isles. 6. ed. London: Univ. of London Press, 1964.

Cita MLA (9a ed.)

Unstead, John Frederick, y Edmund William Gilbert. The British Isles. 6. ed. Univ. of London Press, 1964.