Citação norma APA

(1999). Learn to speak English: Complete interactive English course for non-native speakers. Workbook. Fremont, CA.: The Learning Company.

Citação norma Chicago

Learn to Speak English: Complete Interactive English Course for Non-native Speakers. Workbook. Fremont, CA.: The Learning Company, 1999.

Citação norma MLA

Learn to Speak English: Complete Interactive English Course for Non-native Speakers. Workbook. Fremont, CA.: The Learning Company, 1999.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.