APA Style

Glenday, C. et al (2011). Guinness world records 2011 : gamer's edition (gamer's edition 2011). London: Guinness World Records.

MLA Style

Glenday, Craig. et al. "Guinness world records 2011 : gamer's edition". gamer's edition 2011 London: Guinness World Records, 2011. Text.