APA (7th ed.) Citation

Russell Ash. (2007). Every subject on earth! firefly's world of facts. Firefly books ltd.

Chicago Style (17th ed.) Citation

Russell Ash. Every Subject on Earth! Firefly's World of Facts. U.S: Firefly books ltd, 2007.

MLA (9th ed.) Citation

Russell Ash. Every Subject on Earth! Firefly's World of Facts. Firefly books ltd, 2007.