APA (7th ed.) Citation

Vakkari, P. (2001). A theory of the task-based information retrieval process: A summary and generalisation of a longitudinal study. Journal of documentation, 57(1), 44-60. https://doi.org/10.1108/EUM0000000007075

Chicago Style (17th ed.) Citation

Vakkari, Pertti. "A Theory of the Task-based Information Retrieval Process: A Summary and Generalisation of a Longitudinal Study." Journal of Documentation 57, no. 1 (2001): 44-60. https://doi.org/10.1108/EUM0000000007075.

MLA (9th ed.) Citation

Vakkari, Pertti. "A Theory of the Task-based Information Retrieval Process: A Summary and Generalisation of a Longitudinal Study." Journal of Documentation, vol. 57, no. 1, 2001, pp. 44-60, https://doi.org/10.1108/EUM0000000007075.