APA (7th ed.) Citation

Guy, R. K. (1981). Unsolved Problems in Number Theory. Springer New York. https://doi.org/10.1007/978-1-4757-1738-9

Chicago Style (17th ed.) Citation

Guy, Richard K. Unsolved Problems in Number Theory. New York, NY: Springer New York, 1981. https://doi.org/10.1007/978-1-4757-1738-9.

MLA (9th ed.) Citation

Guy, Richard K. Unsolved Problems in Number Theory. Springer New York, 1981. https://doi.org/10.1007/978-1-4757-1738-9.