Sachs, M. (1990). World guide to scientific associations and learned societies: 5. World guide to scientific associations and learned societies, 5.
Citação norma ChicagoSachs, Michael. "World Guide to Scientific Associations and Learned Societies: 5." World Guide to Scientific Associations and Learned Societies 1990: 5.
Citação norma MLASachs, Michael. "World Guide to Scientific Associations and Learned Societies: 5." World Guide to Scientific Associations and Learned Societies, 1990, p. 5.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.