Arthur G.Tressier...et al. (1972). Science year: The World book science annual. Field Enterprises Educational Corporation.
Citazione stile Chigago Style (17a edizione)Arthur G.Tressier...et al. Science Year: The World Book Science Annual. Chicago: Field Enterprises Educational Corporation, 1972.
Citatione MLA (9a ed.)Arthur G.Tressier...et al. Science Year: The World Book Science Annual. Field Enterprises Educational Corporation, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.