Johnson, C. (1989). Space invaders. Surey.
Cita Chicago (17th ed.)Johnson, Connie. Space Invaders. [Santee, Calif.]: Surey, 1989.
Cita MLA (8th ed.)Johnson, Connie. Space Invaders. Surey, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.