Cita APA (7th ed.)

Celce-Murcia, M., Larsen-Freeman, D., & Williams, H. (1999). The grammar book: An ESL/EFL teacher´s course (2nd ed.). Heinle Cengage Learning.

Cita Chicago (17th ed.)

Celce-Murcia, Marianne, Diane Larsen-Freeman, i Howard Williams. The Grammar Book: An ESL/EFL Teacher´s Course. 2nd ed. Boston, MA: Heinle Cengage Learning, 1999.

Cita MLA (9th ed.)

Celce-Murcia, Marianne, et al. The Grammar Book: An ESL/EFL Teacher´s Course. 2nd ed. Heinle Cengage Learning, 1999.