APA Style

Inc., W, B, ,. (2001). THE WORLD BOOK Encyclopedia 2001 VOLUME 22-Research Guide Index (Edition 18). United states of America: WORLD BOOK , Inc.

MLA Style

Inc., World, Book, ,. "THE WORLD BOOK Encyclopedia 2001 VOLUME 22-Research Guide Index". Edition 18 United states of America: WORLD BOOK , Inc, 2001. Text.