Cita APA (7th ed.)
Gray, E., & Evans, V. Letterfun: Video (1a. ed.). United Kingdom Express publishing.
Cita Chicago (17th ed.)
Gray, Elizabeth, i Virginia Evans. Letterfun: Video. 1a. ed. United Kingdom Express publishing.
Cita MLA (9th ed.)
Gray, Elizabeth, i Virginia Evans. Letterfun: Video. 1a. ed. United Kingdom Express publishing.
Atenció: Aquestes cites poden no estar 100% correctes.