| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Problems in Contract Law: Cases and Materials | 978-0-7355-6255-4 | 2007 | Charles L. Knapp · Nathan M. Crystal |
| Problems in Contract Law: Cases and Materials | 978-0-7355-2714-0 | 2003 | Charles L. Knapp · Nathan M. Crystal |
| Rules of Contract Law 2003-2004 | 978-0-7355-2812-3 | 2003 | Charles L. Knapp · Nathan M. Crystal |
| Rules of Contract Law, 2007-2008 Statutory Supplement: Selections from the Uniform Commerical Code, the Cisg, the Restatement of Contracts, and ... Principles, With Material on Contract D | 978-0-7355-6414-5 | 2007 | Charles L. Knapp · Nathan M. Crystal |