Hashemi, L., & Thomas Krumins, B. (2006). Cambridge grammar for PET with answers: Self-study grammar reference and practice. Cambidge University Press.
Cita Chicago Style (17a ed.)Hashemi, Louise, y Barbara Thomas Krumins. Cambridge Grammar for PET with Answers: Self-study Grammar Reference and Practice. Cambridge, UK: Cambidge University Press, 2006.
Cita MLA (9a ed.)Hashemi, Louise, y Barbara Thomas Krumins. Cambridge Grammar for PET with Answers: Self-study Grammar Reference and Practice. Cambidge University Press, 2006.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.