Cita APA (7a ed.)

Allen, A. F. (1920). An introduction to chemical engineering: An elementary textbook for the use of students and users of chemical machinery. Sir Isaac Pitman and Sons Ltd.

Cita Chicago Style (17a ed.)

Allen, Alfred Frederick. An Introduction to Chemical Engineering: An Elementary Textbook for the Use of Students and Users of Chemical Machinery. Londres: Sir Isaac Pitman and Sons Ltd, 1920.

Cita MLA (9a ed.)

Allen, Alfred Frederick. An Introduction to Chemical Engineering: An Elementary Textbook for the Use of Students and Users of Chemical Machinery. Sir Isaac Pitman and Sons Ltd, 1920.