by James L. Heap
Reference:
James L. Heap, (1988), "On task in classroom discourse", Linguistics and Education, vol. 1, no. 2, pp. 177–198.
Bibtex Entry:
@ARTICLE{Heap1988,
author = "James L. Heap",
doi = "10.1016/S0898-5898(88)80004-4",
keywords = "Education, Classroom Interaction, Task",
journal = "Linguistics and Education",
number = "2",
pages = "177–198",
title = "On task in classroom discourse",
url = "http://www.sciencedirect.com/science/article/pii/S0898589888800044",
volume = "1",
year = "1988",
}