APA (7th ed.) Citation

Lewis, W. C. (1919). A system of physical chemistry. Longmans, Green and Co.

Chicago Style (17th ed.) Citation

Lewis, William C. A System of Physical Chemistry. London [etc.]: Longmans, Green and Co, 1919.

MLA (9th ed.) Citation

Lewis, William C. A System of Physical Chemistry. Longmans, Green and Co, 1919.