Childs, W. H. J. (1972). Physical constants selected for students (9th ed.). Chapman and Hall.
Citazione stile Chigago Style (17a edizione)Childs, W. H. J. Physical Constants Selected for Students. 9th ed. London: Chapman and Hall, 1972.
Citatione MLA (9a ed.)Childs, W. H. J. Physical Constants Selected for Students. 9th ed. Chapman and Hall, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.