Tyrrell, J. e., Tyrrell, J., & Semple, J. (1971). Generalised clifford parallelism. Cambridge University press.
Čikaški stil citiranjaTyrrell, J.A ed, J.A Tyrrell, i J.G Semple. Generalised Clifford Parallelism. Cambridge: Cambridge University press, 1971.
MLA način citiranjaTyrrell, J.A ed, et al. Generalised Clifford Parallelism. Cambridge University press, 1971.
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