What is the correct in-text reference for Thackeray, A.I., Deacon, J., Hall, S., Humphreys, A.J.B. & Morris, A.G. 1990? The Early History of Southern Africa to AD1500. Cape Town: College Tutorial Press.? Select one: a. (Thackeray, Deacon, Hall, Humph

The correct in-text reference for the source you provided is: **d. (Thackeray et al. 1990)** This format is typically used in academic writing to cite works with multiple authors, where "et al." indicates there are additional authors beyond the first listed.