Gaya APA

Ster, J, S, L, K, T. (2014). The blue book of grammar and punctuation : an easy-to-use guide with clear rules, real-world examples, and reproducible quizzes . United States Of America: Wiley - VCH.

Gaya MLA

Ster, Jane, Straus,, Lester, Kaufman,, Tom. "The blue book of grammar and punctuation : an easy-to-use guide with clear rules, real-world examples, and reproducible quizzes". United States Of America: Wiley - VCH, 2014. Text.