Cita APA (7th ed.)
Crawford, R., & Birbal, R. a. B. (2006). Longman ICT for IGCSE (ed.). Person Education.
Cita Chicago (17th ed.)
Crawford, Roger, i Roland and Blair Birbal. Longman ICT for IGCSE. ed. Edinburgh, England: Person Education, 2006.
Cita MLA (9th ed.)
Crawford, Roger, i Roland and Blair Birbal. Longman ICT for IGCSE. ed. Person Education, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.