Cita APA

Yule, G. 1., & Yule, G. 1. (2006). Oxford practice grammar: Advanced with answers. Oxford: Oxford University Press.

Citación estilo Chicago

Yule, George 1947-, y George 1947- Yule. Oxford Practice Grammar: Advanced With Answers. Oxford: Oxford University Press, 2006.

Cita MLA

Yule, George 1947-, y George 1947- Yule. Oxford Practice Grammar: Advanced With Answers. Oxford: Oxford University Press, 2006.