Cita APA (7a ed.)

Johnson, S. (2007). Mac OS X Leopard on demand. Que.

Cita Chicago Style (17a ed.)

Johnson, Steve. Mac OS X Leopard on Demand. Indianapolis: Que, 2007.

Cita MLA (8a ed.)

Johnson, Steve. Mac OS X Leopard on Demand. Que, 2007.