Abbs, B., Ayton, A., & Freebairn, I. (1975). Strategies: Integrated english language materials (1a. ed.). Longman.
芝加哥风格引文Abbs, Brian, Angela Ayton, 与 Ingrid Freebairn. Strategies: Integrated English Language Materials. 1a. ed. Essex: Longman, 1975.
MLA引文Abbs, Brian, et al. Strategies: Integrated English Language Materials. 1a. ed. Longman, 1975.
警告：这些引文格式不一定是100％准确.