Cita APA (7th ed.)

Tyrrell, J. A., & Semple, J. G. (1971). Generalized Clifford parallelism. University Press.

Cita Chicago (17th ed.)

Tyrrell, J. A., i J. G. Semple. Generalized Clifford Parallelism. Cambridge [Eng.]: University Press, 1971.

Cita MLA (8th ed.)

Tyrrell, J. A., i J. G. Semple. Generalized Clifford Parallelism. University Press, 1971.