The ISBN of The National Lampoon Encyclopedia of Humor is 1-59071-042-8.
The ISBN of National Lampoon's Doon is 0-671-54144-7.
The ISBN of National Lampoon Sunday Newspaper Parody is 978-1-59071-037-1.
The ISBN of The Otaku Encyclopedia is 9784770031013.
The ISBN of Dinosaur Encyclopedia is 0789479354.
The ISBN of Conspiracy Encyclopedia is 1596091568.
The ISBN of Encyclopedia of Chicago is 0226310159.
The ISBN of The Encyclopedia of Fantasy is 978-1857233681.
The ISBN of WWE Encyclopedia is 075664190-X.
The ISBN of Encyclopedia of American Religions is 978-0787696962.
The ISBN of Encyclopedia of Conifers is 978-1-907057-15-1.
The ISBN of Encyclopedia of China is 978-7-5000-7958-3.
The ISBN of The Soap Opera Encyclopedia is 006-101157-6.