There are many resources that record citation counts for published material. None are considered comprehensive.
Secondary documents are items not available in the Scopus database but are extracted from references found in Scopus.
The Amazon.com Citations program provides times cited data for books in the Product Details section for a title. This data is available only for items offering the "search inside the book" feature and is limited to book to book citations.
Register for Google Scholar Citations to track citations to your publications.
Many subject specialized databases provide times cited information. Below are some examples. See the Databases by Subject listings to check and see if a database in your discipline offers times cited information.