John P Nelson & Patricia K Werner. (1997). Communicative grammar (Second.). MCGraw hill companies.
Chicago Edition CitationJohn P Nelson and Patricia K Werner. Communicative Grammar. Second. MCGraw hill companies, 1997.
MLA Edition CitationJohn P Nelson and Patricia K Werner. Communicative Grammar. Second. MCGraw hill companies, 1997.
Warning: These citations may not always be 100% accurate.