Dyfyniad APA

Harris, M., & Michael Harris; Anna Sikorzyńska. (2013). Choices: Upper intermediate students' books. Harlow: Pearson.

Dyfyniad Arddull Chicago

Harris, Michael, và Michael Harris; Anna Sikorzyńska. Choices: Upper Intermediate Students' Books. Harlow: Pearson, 2013.

Dyfyniad MLA

Harris, Michael, và Michael Harris; Anna Sikorzyńska. Choices: Upper Intermediate Students' Books. Harlow: Pearson, 2013.

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