Cita APA (7th ed.)

Childs, W. H. J. (1946). Physical constants,: Selected for students (4th ed., rev.). Methuen.

Cita Chicago (17th ed.)

Childs, W. H. J. Physical Constants,: Selected for Students. 4th ed., rev. London,: Methuen, 1946.

Cita MLA (8th ed.)

Childs, W. H. J. Physical Constants,: Selected for Students. 4th ed., rev. Methuen, 1946.