Guinness World Records Limited & Glenday, C. (2010). Guinness world records 2011. Guinness World Records.
Citación estilo ChicagoGuinness World Records Limited and Craig Glenday. Guinness World Records 2011. [London]: Guinness World Records, 2010.
Cita MLAGuinness World Records Limited and Craig Glenday. Guinness World Records 2011. Guinness World Records, 2010.
Warning: These citations may not always be 100% accurate.