APA (7th ed.) Citation

O'Malley, R. E. (1974). Introduction to singular perturbations. Academic Press.

Chicago Style (17th ed.) Citation

O'Malley, Robert E. Introduction to Singular Perturbations. New York: Academic Press, 1974.

MLA (9th ed.) Citation

O'Malley, Robert E. Introduction to Singular Perturbations. Academic Press, 1974.