Cita APA (7th ed.)

Ludwig, E. E. (1979). Applied process design for chemical and petrochemical plants (2a. ed.). Gulf Publishing Company.

Cita Chicago (17th ed.)

Ludwig, Ernest E. Applied Process Design for Chemical and Petrochemical Plants. 2a. ed. Houston: Gulf Publishing Company, 1979.

Cita MLA (9th ed.)

Ludwig, Ernest E. Applied Process Design for Chemical and Petrochemical Plants. 2a. ed. Gulf Publishing Company, 1979.