Cita APA (7th ed.)

Crofton, I. (1990). The Guinness encyclopedia. Guiness Publishing.

Cita Chicago (17th ed.)

Crofton, Ian،. The Guinness Encyclopedia. London: Guiness Publishing, 1990.

Cita MLA (9th ed.)

Crofton, Ian،. The Guinness Encyclopedia. Guiness Publishing, 1990.

Atenció: Aquestes cites poden no estar 100% correctes.