APA (7th ed.) Citation

Hayman, W. K., & Lingham, E. F. (2019). Research problems in function theory (fiftieth anniversary edition.). Springer.

Chicago Style (17th ed.) Citation

Hayman, Walter K., and Eleanor F. Lingham. Research Problems in Function Theory. fiftieth anniversary edition. Cham: Springer, 2019.

MLA (9th ed.) Citation

Hayman, Walter K., and Eleanor F. Lingham. Research Problems in Function Theory. fiftieth anniversary edition. Springer, 2019.