APA Citation

Koll, M., & Funk, R. (2012). Understanding English grammar (9. ed.). New York: Pearson.

Chicago Style Citation

Koll, Martha, and Robert Funk. Understanding English Grammar. 9. ed. New York: Pearson, 2012.

MLA Citation

Koll, Martha, and Robert Funk. Understanding English Grammar. 9. ed. New York: Pearson, 2012.

Warning: These citations may not always be 100% accurate.