West, M. P. (1964). A dictionary of spelling, british and American. Longmans.
Cita Chicago (17th ed.)West, Michael Philip. A Dictionary of Spelling, British and American. [London]: Longmans, 1964.
Cita MLA (9th ed.)West, Michael Philip. A Dictionary of Spelling, British and American. Longmans, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.