International Congress of Applied Linguistics, Halliday, M. A. K., Gibbons, J., & Nicholas, H. (1990). Learning, keeping, and using language: Selected papers from the 8th World Congress of Applied Linguistics, Sydney, 16-21 August 1987. John Benjamins Pub. Co..
Παραπομπή σε μορφή Chicago (17η εκδ.)International Congress of Applied Linguistics, M. A. K. Halliday, John Gibbons, και Howard Nicholas. Learning, Keeping, and Using Language: Selected Papers from the 8th World Congress of Applied Linguistics, Sydney, 16-21 August 1987. Amsterdam ; Philadelphia: John Benjamins Pub. Co., 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)International Congress of Applied Linguistics, et al. Learning, Keeping, and Using Language: Selected Papers from the 8th World Congress of Applied Linguistics, Sydney, 16-21 August 1987. John Benjamins Pub. Co., 1990.