Citazione Stile APA (7a Edizione)
(1977). The 1977 world book year book.: The annual supplement to the world book encyclopedia (ed.). Field enterprises educational corporation.
Citazione stile Chigago Style (17a edizione)
The 1977 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: Field enterprises educational corporation, 1977.
Citatione MLA (9a ed.)
The 1977 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Field enterprises educational corporation, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.