Pittman, G. (1966). Activating the use of prepositions. NY.: Longman.
Trích dẫn kiểu ChicagoPittman, G.A. Activating the Use of Prepositions. NY.: Longman, 1966.
MLA引文Pittman, G.A. Activating the Use of Prepositions. NY.: Longman, 1966.
警告：這些引文格式不一定是100％准確.