Cita APA (7a ed.)

Holt, P. M. (1964). Colombia today- and tomorrow. Pall Mall Press.

Cita Chicago Style (17a ed.)

Holt, Pat M. Colombia Today- and Tomorrow. London: Pall Mall Press, 1964.

Cita MLA (9a ed.)

Holt, Pat M. Colombia Today- and Tomorrow. Pall Mall Press, 1964.