There are space pages set up for many 'family' genealogy books. These pages have a source citation that can be used on profiles, as well as some online links for the books, if there are some available.
The Coggswell in America book has a space page. There are 3 locations listed where the book is online. If you add the source citation to the profiles, then you can return to this space page and select the 'WikiTree Profiles that use this source' link on that page to find the profiles that have that space page added to them. There are several profiles already on Wikitree that use that source.
The citation on that page is using Span, which many people do not understand. You can use the Source citation with the Span coding or you can remove it. You would just need to add the link and Page to the end of the citation for each profile.