Organized by source type, find explanations for, and examples of, footnote and bibliographic citations in Chicago Manual of Style.
Zotero
Learn how to use Zotero (a free, open source extension for the Firefox
browser that enables users to collect, manage, and cite research from
all types of sources from the browser)
Access 10Q and 10K forms from the United States Securities and Exchange Commission's Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system.
Provides information on the history, people, government, economy, energy, geography, communications, transportation, military, and transnational issues for 267 world entities.