Cita APA (7a ed.)

Kovach, L. D. (1984). Boundary-value problems. Addison-Wesley.

Cita Chicago Style (17a ed.)

Kovach, Ladis D. Boundary-value Problems. Reading: Addison-Wesley, 1984.

Cita MLA (9a ed.)

Kovach, Ladis D. Boundary-value Problems. Addison-Wesley, 1984.