APA (7th ed.) Citation

Gilbert, R. P. (1983). First order elliptic systems: A function theoretic approach. Academic Press.

Chicago Style (17th ed.) Citation

Gilbert, Robert P. First Order Elliptic Systems: A Function Theoretic Approach. New York: Academic Press, 1983.

MLA (9th ed.) Citation

Gilbert, Robert P. First Order Elliptic Systems: A Function Theoretic Approach. Academic Press, 1983.