APA (7th ed.) Citation

Oxley, J., Oxley, J. G., & Welsh, D. (1978). Some problems in combinatorial geometry.

Chicago Style (17th ed.) Citation

Oxley, J., James G. Oxley, and D. Welsh. Some Problems in Combinatorial Geometry. 1978.

MLA (9th ed.) Citation

Oxley, J., et al. Some Problems in Combinatorial Geometry. 1978.