Dyfyniad APA

Bowler, B., & Bill Bowler; Sue Parminter. (2008). Happy Earth American english: Teacher's Book. Oxford,New York: Oxford University Press.

Dyfyniad Arddull Chicago

Bowler, Bill, và Bill Bowler; Sue Parminter. Happy Earth American English: Teacher's Book. Oxford,New York: Oxford University Press, 2008.

Dyfyniad MLA

Bowler, Bill, và Bill Bowler; Sue Parminter. Happy Earth American English: Teacher's Book. Oxford,New York: Oxford University Press, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.