Sudarwati, M. (2008). Look Ahead 2 An English Course for Senior High School Students Year XI (SMA & MA) Science and Social Study Programme. Eralangga.
Cita Chicago Style (17a ed.)Sudarwati, M. Look Ahead 2 An English Course for Senior High School Students Year XI (SMA & MA) Science and Social Study Programme. Eralangga, 2008.
Cita MLA (8a ed.)Sudarwati, M. Look Ahead 2 An English Course for Senior High School Students Year XI (SMA & MA) Science and Social Study Programme. Eralangga, 2008.
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