Gaya APA

Langan, J. (2008). College writing skills with readings (7th ed. (Mc Graw-Hill International Edition)). Boston: Mc Graw Hill.

Gaya MLA

Langan, John. "College writing skills with readings". 7th ed. (Mc Graw-Hill International Edition) Boston: Mc Graw Hill, 2008. BUKU.