Williams, T. I., & Withers, S. (1969). A biographical dictionary of scientists. Black.
Cita Chicago Style (17a ed.)Williams, Trevor Illtyd, e Sonia Withers. A Biographical Dictionary of Scientists. Londres: Black, 1969.
Cita MLA (8a ed.)Williams, Trevor Illtyd, e Sonia Withers. A Biographical Dictionary of Scientists. Black, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.