Cita APA (7th ed.)

KING, A. (2008). WEBSITE OPTIMISATION. O REILLY.

Cita Chicago (17th ed.)

KING, A.B. WEBSITE OPTIMISATION. MUMBAI: O REILLY, 2008.

Cita MLA (9th ed.)

KING, A.B. WEBSITE OPTIMISATION. O REILLY, 2008.