Cita APA (7th ed.)

Littlejohn, A., & Hicks, D. (1998). Cambridge english for schools: Student's book four. Cambridge University Press.

Cita Chicago (17th ed.)

Littlejohn, Andrew, i Diana Hicks. Cambridge English for Schools: Student's Book Four. Cambridge: Cambridge University Press, 1998.

Cita MLA (9th ed.)

Littlejohn, Andrew, i Diana Hicks. Cambridge English for Schools: Student's Book Four. Cambridge University Press, 1998.