Best Bet! The MLA Bibliography is the best source for locating critical sources from scholarly articles and chapters in books
Sample Search for critical sources from books:
Woolf, Virginia, 1882-1941 Criticism and interpretation.
International Virginia Woolf Society
The International Virginia Woolf Society is devoted to encouraging and facilitating the scholarly study of, critical attention to, and general interest in, the work and career of Virginia Woolf. Site hosted by the University of Toronto.
Virginia Woolf Society of Great Britain
The Virginia Woolf Society of Great Britain is a non-profit organisation that aims to raise the profile of Virginia Woolf and promote the reading and discussion of her works.
Woolf Online: Published in 2013, Woolf Online is currently a digital archive of Virginia Woolf's To the Lighthouse (1927)
The site is intended to serve as a resource for research and study of Woolf's modernist classic. On this site you will find images and transcriptions of the holograph drafts (in three notebooks housed in the Berg Collection of the New York Public Library), the typescripts, the proofs, and various early editions of the novel, including the first British and American editions and their variants.