Spoken english & written english (word book grades - eight to twelve). Institute of Western Music & Speech.
Chicago Style (17th ed.) CitationSpoken English & Written English (word Book Grades - Eight to Twelve). Colombo 04: Institute of Western Music & Speech.
MLA (9th ed.) CitationSpoken English & Written English (word Book Grades - Eight to Twelve). Institute of Western Music & Speech.
Warning: These citations may not always be 100% accurate.