APA Edition Citation

Rellich, F. (1969). Perturbation theory of Eigen value problems. Gorden and Breach.

Chicago Edition Citation

Rellich, Franz. Perturbation Theory of Eigen Value Problems. Gorden and Breach, 1969.

MLA Edition Citation

Rellich, Franz. Perturbation Theory of Eigen Value Problems. Gorden and Breach, 1969.

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