Blackburn, Simon (1994). "ordered n-tuple". The Oxford Dictionary of Philosophy. Oxford quick reference (edisi ke-3). Oxford: Oxford University Press (dipublikasikan tanggal 2016). hlm. 342. ISBN978-0-1987-3530-4. Diakses tanggal 30 Juni 2017. ordered n-tuple[:] A generalization of the notion of an [...] ordered pair to sequences of n objects.