APA

Leighton J., Leighton J., Hearn I., Gómez Mut M., Puertollano F., Gómez N., Vidal C., Ferrándiz E. & Serri J. (2001). Fun english 4. Madrid: Pearson education.

Chicago

Leighton Jill, Leighton Jill, Hearn Izabella, Gómez Mut Mariana, Puertollano Fernando, Gómez Nacho, Vidal Cristtina, Ferrándiz Elena and Serri Juliana. 2001. Fun english 4. Madrid: Pearson education.

Harvard

Leighton J., Leighton J., Hearn I., Gómez Mut M., Puertollano F., Gómez N., Vidal C., Ferrándiz E. and Serri J. (2001). Fun english 4. Madrid: Pearson education.

MLA

Leighton Jill, Leighton Jill, Hearn Izabella, Gómez Mut Mariana, Puertollano Fernando, Gómez Nacho, Vidal Cristtina, Ferrándiz Elena and Serri Juliana. Fun english 4. Madrid: Pearson education. 2001.