Cita APA (7th ed.)
Elizabeth, G. Welcome 1 (1a. ed.). United Kingdom Express publishing.
Cita Chicago (17th ed.)
Elizabeth, Gray. Welcome 1. 1a. ed. United Kingdom Express publishing.
Cita MLA (9th ed.)
Elizabeth, Gray. Welcome 1. 1a. ed. United Kingdom Express publishing.
Atenció: Aquestes cites poden no estar 100% correctes.