APA (7th ed.) Zitazioa

Chalker, S. (1992). A students english grammar: Workbook. Longman.

Chicago Style (17th ed.) Zitazioa

Chalker, Sylvia. A Students English Grammar: Workbook. Essex: Longman, 1992.

MLA (9th ed.) Zitazioa

Chalker, Sylvia. A Students English Grammar: Workbook. Longman, 1992.