APA (7th ed.) Citation

MCFARLAN, BISHOP, & JACKSON. (1994). The guinness book of why? Guiness Publishing.

Chicago Style (17th ed.) Citation

MCFARLAN, BISHOP, and JACKSON. The Guinness Book of Why? London: Guiness Publishing, 1994.

MLA (8th ed.) Citation

MCFARLAN, et al. The Guinness Book of Why? Guiness Publishing, 1994.