Gaya APA

Fuchs, M. et al (2006). FOCUS ON GRAMMAR : AN INTEGRATED SKILLS APPROACH THIRD EDITION (3rd ed). United State of America: Pearson Longman.

Gaya MLA

Fuchs, Marjorie. et al. "FOCUS ON GRAMMAR : AN INTEGRATED SKILLS APPROACH THIRD EDITION". 3rd ed United State of America: Pearson Longman, 2006. Text.