APA

Hua L., Lin W. & Wu C. (1985). Second-order systems of partial differential equations in the plane. Boston, Mass. [u.a.]: Pitman.

Chicago

Hua Luogeng, Lin Wei and Wu Ci-Quian. 1985. Second-order systems of partial differential equations in the plane. Boston, Mass. [u.a.]: Pitman.

Harvard

Hua L., Lin W. and Wu C. (1985). Second-order systems of partial differential equations in the plane. Boston, Mass. [u.a.]: Pitman.

MLA

Hua Luogeng, Lin Wei and Wu Ci-Quian. Second-order systems of partial differential equations in the plane. Boston, Mass. [u.a.]: Pitman. 1985.