Childs, W. H. J. (1958). Physical constants: Selected for students ([8th ed., rev.].). Methuen.
Chicago Style aipamenaChilds, W. H. J. Physical Constants: Selected for Students. [8th ed., rev.]. London: Methuen, 1958.
MLA aipamenaChilds, W. H. J. Physical Constants: Selected for Students. [8th ed., rev.]. Methuen, 1958.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.