Etherton, A. R. B. (1994). General Certificate English. Nelson.
Chicago Style (17th ed.) CitationEtherton, A. R. B. General Certificate English. Walton-on-Thames: Nelson, 1994.
MLA引文Etherton, A. R. B. General Certificate English. Nelson, 1994.
警告:這些引文格式不一定是100%准確.