The full reference to the book should be:
Z. Bai, J. Demmel, J. Dongarra, A. Ruhe, and H. van der Vorst, editors. Templates for the Solution of Algebraic Eigenvalue Problems: A Practical Guide. SIAM, Philadelphia, 2000.The reference to a section with the indicated authorship should be, for example:
R. Lehoucq and D. Sorensen. Implicitly Restarted Lanczos Method (Section 4.5). In Z. Bai, J. Demmel, J. Dongarra, A. Ruhe, and H. van der Vorst, editors, Templates for the Solution of Algebraic Eigenvalue Problems: A Practical Guide, pages-