APA (7th ed.) Citation

Sottomayor, M. M. (2004). Brush up your grammar (s/ed.). Porto Editora.

Chicago Style (17th ed.) Citation

Sottomayor, Mª Manuela. Brush Up Your Grammar. s/ed. Porto Editora, 2004.

MLA (8th ed.) Citation

Sottomayor, Mª Manuela. Brush Up Your Grammar. s/ed. Porto Editora, 2004.

Warning: These citations may not always be 100% accurate.