Crofton, I. (1990). The Guinness encyclopedia. Guiness Publishing.
Chicagoスタイル(17版)引用形式Crofton, Ian،. The Guinness Encyclopedia. London: Guiness Publishing, 1990.
MLA(9版)引用形式Crofton, Ian،. The Guinness Encyclopedia. Guiness Publishing, 1990.
警告: この引用は必ずしも正確ではありません.