The srfi document has the following references:

[CommonLisp]
Common Lisp: the Language
Guy L. Steele Jr. (editor).
Digital Press, Maynard, Mass., second edition 1990.
Available at http://www.elwood.com/alu/table/references.htm#cltl2.
The Common Lisp "HyperSpec," produced by Kent Pitman, is essentially the
ANSI spec for Common Lisp:
http://www.harlequin.com/education/books/HyperSpec/.

Neither of the links work any more.
The first one may be replaced with, for example:
http://www.cs.cmu.edu/Groups/AI/html/cltl/cltl2.html
The second one may, perhaps, be replaced with:
https://www.cs.cmu.edu/Groups/AI/html/hyperspec/HyperSpec/FrontMatter/Chapter-Index.html

As a side-note, the reference to the scheme although correct, may be,
perhaps extended to also include the R^7RS.

Vladimir