Gaya APA

Lou, R. (2012). Workbook 2 For elementary- Intermediate learners of English around the world English Gramar and How to use it . Jakarta: Mobile English, Eplus.

Gaya MLA

Lou, Robby. "Workbook 2 For elementary- Intermediate learners of English around the world English Gramar and How to use it". Jakarta: Mobile English, Eplus, 2012. Text.