Cita APA (7th ed.)

Hay, J. (1981). The undiscovered country. W.W. Norton.

Cita Chicago (17th ed.)

Hay, John. The Undiscovered Country. New York: W.W. Norton, 1981.

Cita MLA (9th ed.)

Hay, John. The Undiscovered Country. W.W. Norton, 1981.