Cita APA (7a ed.)
Ludwig, E. E. (1991). Applied Process Design For Chemical and Petrochemical Plants (2a edición.). Gulf.
Cita estilo Chicago (17a ed.)
Ludwig, Ernest E. Applied Process Design For Chemical and Petrochemical Plants. 2a edición. Houston, EUA: Gulf, 1991.
Cita MLA (9a ed.)
Ludwig, Ernest E. Applied Process Design For Chemical and Petrochemical Plants. 2a edición. Gulf, 1991.
警告：这些引文格式不一定是100％准确.