Cita APA (7a ed.)

Unstead, J. F., Elloway, I. G., & Gilbert, E. W. (1965). A world survey: From the human aspect (6. ed.). Univ. of London Press.

Cita Chicago Style (17a ed.)

Unstead, John Frederick, I. G. Elloway, y Edmund William Gilbert. A World Survey: From the Human Aspect. 6. ed. London: Univ. of London Press, 1965.

Cita MLA (9a ed.)

Unstead, John Frederick, et al. A World Survey: From the Human Aspect. 6. ed. Univ. of London Press, 1965.