APA-viite (7. p.)

LUDWIG, E. E. (1997). Applied process design for chemical and petrochemical plants (Ed.32.). Gulf Professional Publishing.

Chicago-viite (17. p.)

LUDWIG, Ernest E. Applied Process Design for Chemical and Petrochemical Plants. Ed.32. Texas: Gulf Professional Publishing, 1997.

MLA-viite (9. p.)

LUDWIG, Ernest E. Applied Process Design for Chemical and Petrochemical Plants. Ed.32. Gulf Professional Publishing, 1997.