Gaya APA

Koch, B, S, A, S, A, H, R, S. (2017). Understanding and Using English Grammar, Workbook Split A . : Pearson Education ESL.

Gaya MLA

Koch, Betty, S., Azar;, Stacy, A., Hagen;, Rachel, Spack. "Understanding and Using English Grammar, Workbook Split A". : Pearson Education ESL, 2017. Text.