(Felleisen et al. 2010)  (Felleisen et al. 2010, part I)  (Felleisen et
al. 2010, part II)  (Felleisen et al. 2010)

 (Sitaram 1993)

 (Look ma, no authors ???)

 (date ???)

Bibliography

And no date. Look ma, no authors.                                     
Matthias Felleisen, Robert Bruce Findler, and Matthew Flatt. Semantics
Engineering with PLT Redex. MIT Press, 2010.                          
Look ma, no authors.                                                  
Dorai Sitaram. Programming in Schelog. 1993.                          
http://www.ccs.neu.edu/~dorai/schelog/schelog.html