APA (7th ed.) Citation

Barnes,Julia. (2007). Pet guinea pigs. Weekly reader books.

Chicago Style (17th ed.) Citation

Barnes,Julia. Pet Guinea Pigs. Usa: Weekly reader books, 2007.

MLA (9th ed.) Citation

Barnes,Julia. Pet Guinea Pigs. Weekly reader books, 2007.

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