APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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

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