APA (7th ed.) Citation

Krall, H. L. (1940). On orthogonal polynomials satisfying a certain fourth order differential equation. The Pennsylvania State College.

Chicago Style (17th ed.) Citation

Krall, Harry LeVern. On Orthogonal Polynomials Satisfying a Certain Fourth Order Differential Equation. State College, Pa.: The Pennsylvania State College, 1940.

MLA (9th ed.) Citation

Krall, Harry LeVern. On Orthogonal Polynomials Satisfying a Certain Fourth Order Differential Equation. The Pennsylvania State College, 1940.

Warning: These citations may not always be 100% accurate.