Gaya APA

Lems, K. (2009). Improve your written english : master the essentials of grammar, punctuation and write with greater confidence (Ed 5). Banjarmasin: How to Books.

Gaya MLA

Lems, Kristin. "Improve your written english : master the essentials of grammar, punctuation and write with greater confidence". Ed 5 Banjarmasin: How to Books, 2009. Text.