Cita APA (7a ed.)

Heyderman, E., Mauchline, F., Morris, D., & Ottolina,Alejandra. (2017). PHASES: Student's book 1 (2a. ed.). Macmillan.

Cita Chicago Style (17a ed.)

Heyderman, Emma, Fiona Mauchline, Daniel Morris, y Ottolina,Alejandra. PHASES: Student's Book 1. 2a. ed. Boulogne: Macmillan, 2017.

Cita MLA (8a ed.)

Heyderman, Emma, et al. PHASES: Student's Book 1. 2a. ed. Macmillan, 2017.