Cita APA

Irwin,Christopher. (2000). Guinness world records 2001. Guinnes world research records Ltd.

Citación estilo Chicago

Irwin,Christopher. Guinness World Records 2001. London: Guinnes world research records Ltd, 2000.

Cita MLA

Irwin,Christopher. Guinness World Records 2001. Guinnes world research records Ltd, 2000.