Cita APA

Bowler, B., & Bill Bowler; Sue Parminter. (2007). Happy World American English: Teacher's Book. Oxford: Oxford University Press.

Chicago Style Citation

Bowler, Bill, i Bill Bowler; Sue Parminter. Happy World American English: Teacher's Book. Oxford: Oxford University Press, 2007.

Cita MLA

Bowler, Bill, i Bill Bowler; Sue Parminter. Happy World American English: Teacher's Book. Oxford: Oxford University Press, 2007.