Butt, J., & Benjamin, C. (1995). A new reference grammar of modern Spanish / John Butt, Carmen Benjamin (2nd ed.). NTC Pub. Group.
Chicago Style (17th ed.) CitationButt, John, and Carmen Benjamin. A New Reference Grammar of Modern Spanish / John Butt, Carmen Benjamin. 2nd ed. Lincolnwood, Ill., USA: NTC Pub. Group, 1995.
MLA (9th ed.) CitationButt, John, and Carmen Benjamin. A New Reference Grammar of Modern Spanish / John Butt, Carmen Benjamin. 2nd ed. NTC Pub. Group, 1995.
Warning: These citations may not always be 100% accurate.