Trích dẫn APA

Osborne, C. (2012). First certificate practice tests with key. Hoa Kỳ: Nationnal Geographic Learning Cengage Learning.

Trích dẫn kiểu Chicago

Osborne, Charles. First Certificate Practice Tests With Key. Hoa Kỳ: Nationnal Geographic Learning Cengage Learning, 2012.

MLA Trích dẫn

Osborne, Charles. First Certificate Practice Tests With Key. Hoa Kỳ: Nationnal Geographic Learning Cengage Learning, 2012.

Warning: These citations may not always be 100% accurate.