APA (7th ed.) Citation

Smith, A. (1984). The Guinness book of clocks. Guinness Superlatives.

Chicago Style (17th ed.) Citation

Smith, Alan. The Guinness Book of Clocks. Enfield: Guinness Superlatives, 1984.

MLA (9th ed.) Citation

Smith, Alan. The Guinness Book of Clocks. Guinness Superlatives, 1984.

Warning: These citations may not always be 100% accurate.