APA-viite

Sayer, M. (2014). Life: Elementary. Teacher's Book. A2 (Vietnam edtion.). Singapore: National Geographic Learning; Cengage Learning.

Chicago-tyylinen lähdeviittaus

Sayer, Mike. Life: Elementary. Teacher's Book. A2. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2014.

MLA-viite

Sayer, Mike. Life: Elementary. Teacher's Book. A2. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2014.

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