APA (7th ed.) Citation

Croft, H. T., Falconer, K. J., & Guy, R. K. (1994). Unsolved problems in geometry (2. corr. print.). Springer.

Chicago Style (17th ed.) Citation

Croft, Hallard T., Kenneth J. Falconer, and Richard K. Guy. Unsolved Problems in Geometry. 2. corr. print. New York u.a: Springer, 1994.

MLA (9th ed.) Citation

Croft, Hallard T., et al. Unsolved Problems in Geometry. 2. corr. print. Springer, 1994.