APA (7th ed.) Citation

Marques, A., & Soeiro, R. (1990). Time for english (16.ed.). Ática W. Roth.

Chicago Style (17th ed.) Citation

Marques, Amadeu, and Roberto Soeiro. Time for English. 16.ed. São Paulo, SP: Ática W. Roth, 1990.

MLA (9th ed.) Citation

Marques, Amadeu, and Roberto Soeiro. Time for English. 16.ed. Ática W. Roth, 1990.