Cita APA

Norris & Ross. (1974). Guinness book of records (21st.). Guiness Superlatives.

Citación estilo Chicago

Norris y Ross. Guinness Book of Records. 21st. Middlesex: Guiness Superlatives, 1974.

Cita MLA

Norris y Ross. Guinness Book of Records. 21st. Guiness Superlatives, 1974.