Cita APA (7th ed.)

(1973). Children's Britannica (3a. ed.). Encyclopaedia Britannica International.

Cita Chicago (17th ed.)

Children's Britannica. 3a. ed. Londres: Encyclopaedia Britannica International, 1973.

Cita MLA (9th ed.)

Children's Britannica. 3a. ed. Encyclopaedia Britannica International, 1973.