Cita APA (7a ed.)

Humble, J. (1967). Improving business result. Mc Graw Hill.

Cita Chicago Style (17a ed.)

Humble, John. Improving Business Result. London: Mc Graw Hill, 1967.

Cita MLA (9a ed.)

Humble, John. Improving Business Result. Mc Graw Hill, 1967.