World Health Organization. (1984). Extremely Low Frequency (Elf) Fields. Geneva: WHO.
Citación estilo ChicagoWorld Health Organization. Extremely Low Frequency (Elf) Fields. Geneva: WHO, 1984.
Cita MLAWorld Health Organization. Extremely Low Frequency (Elf) Fields. Geneva: WHO, 1984.
Precaución: Estas citas no son 100% exactas.