APA (7th ed.) Citation

Martins, E. P., Amos, E., & Pasqualin, E. (1994). Graded english (2.ed.). Moderna Hamburg.

Chicago Style (17th ed.) Citation

Martins, Elisabeth Prescher, Eduardo Amos, and Ernesto Pasqualin. Graded English. 2.ed. São Paulo, SP: Moderna Hamburg, 1994.

MLA (9th ed.) Citation

Martins, Elisabeth Prescher, et al. Graded English. 2.ed. Moderna Hamburg, 1994.