Gaya APA

SCOENBERG, I, E., Maurer, J. (2006). FOCUS ON GRAMMAR : AN INTEGRATED SKILLS APPROACH (2nd ed). united states of america: Pearson Longman.

Gaya MLA

SCOENBERG, IRENE, E.., Maurer, Jay. "FOCUS ON GRAMMAR : AN INTEGRATED SKILLS APPROACH". 2nd ed united states of america: Pearson Longman, 2006. Text.