Cita APA (7a ed.)

Buchan, J. (1967). The thirty-nine steps. Grafisk Forlag.

Cita Chicago Style (17a ed.)

Buchan, John. The Thirty-nine Steps. Copenhague: Grafisk Forlag, 1967.

Cita MLA (9a ed.)

Buchan, John. The Thirty-nine Steps. Grafisk Forlag, 1967.