Cita APA

Mackey, D., Jenkins, R., & Johnson, S. (2015). Grammar explorer. Boston: National Geographic Learning, Cengage Learning.

Chicago Style Citation

Mackey, Daphne, Rob Jenkins, i Staci Johnson. Grammar Explorer. Boston: National Geographic Learning, Cengage Learning, 2015.

Cita MLA

Mackey, Daphne, Rob Jenkins, i Staci Johnson. Grammar Explorer. Boston: National Geographic Learning, Cengage Learning, 2015.

Atenció: Aquestes cites poden no estar 100% correctes.