Cita APA (7th ed.)

Gribben, R. J. (1975). Elementary Partial Differential Equations. Van Nostrand Reinhold.

Cita Chicago (17th ed.)

Gribben, Ronald J. Elementary Partial Differential Equations. London: Van Nostrand Reinhold, 1975.

Cita MLA (9th ed.)

Gribben, Ronald J. Elementary Partial Differential Equations. Van Nostrand Reinhold, 1975.