Cita APA (7th ed.)

Sande, W., & Sande, C. (2009). Hello world!: Computer programming for kids and other beginners. Manning.

Cita Chicago (17th ed.)

Sande, Warren, i Carter Sande. Hello World!: Computer Programming for Kids and Other Beginners. Greenwich, Conn: Manning, 2009.

Cita MLA (9th ed.)

Sande, Warren, i Carter Sande. Hello World!: Computer Programming for Kids and Other Beginners. Manning, 2009.