Professional SAS Programmer's Pocket Reference
Purchasing this book may be the best investment you can make in   your SAS programming work.  Even if you already have all this   information on your bookshelf -- spread out over thousands of pages in   dozens of books -- it's faster and easier to have one book you can   refer to for 90 percent of the questions that come up. Some   professional SAS programmers using the first edition of this book have   told us that they are saving an hour a week looking things up as they   write SAS programs. If you save just one minute a day, this book pays   for itself in a matter of weeks.--This text refers to an out of print or unavailable edition of this title.