Citazione Stile APA (7a Edizione)

STEPHENS RYAN K. (2008). SAMS TEACH YOURSELF SQL IN 21 DAYS. TECHMEDIA.

Citazione stile Chigago Style (17a edizione)

STEPHENS RYAN K. SAMS TEACH YOURSELF SQL IN 21 DAYS. NEW DELHI: TECHMEDIA, 2008.

Citatione MLA (9a ed.)

STEPHENS RYAN K. SAMS TEACH YOURSELF SQL IN 21 DAYS. TECHMEDIA, 2008.