Alphabetize Oberon, Objective-C, Postgres

free-programming-books.md

@@ -1168,15 +1168,15 @@ See also [TeX](#tex)
 
 
 ###Oberon
-* [Programming in Oberon](http://www-old.oberon.ethz.ch/WirthPubl/ProgInOberon.pdf) (PDF)
 * [Object-Oriented Programming in Oberon-2](http://ssw.jku.at/Research/Books/Oberon2.pdf) (PDF)
+* [Programming in Oberon](http://www-old.oberon.ethz.ch/WirthPubl/ProgInOberon.pdf) (PDF)
 
 
 ###Objective-C
-* [Programming With Objective-C](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/ProgrammingWithObjectiveC.pdf) (PDF)
+* [Google's Objective-C Style Guide](http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml)
 * [Object-Oriented Programming with Objective-C](http://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/OOP_ObjC/OOP_ObjC.pdf) (PDF)
 * [Objective-C Succinctly, Syncfusion](http://www.syncfusion.com/resources/techportal/ebooks/objective-c) (PDF, Kindle) *(Just fill the fields with any values)*
-* * [Google's Objective-C Style Guide](http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml)
+* [Programming With Objective-C](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/ProgrammingWithObjectiveC.pdf) (PDF)
 * [Try Objective-C Book](http://tryobjectivec.codeschool.com/)
 
 
@@ -1277,8 +1277,8 @@ See also [TeX](#tex)
 
 
 ###PostgreSQL
-* [Practical PostgreSQL](http://www.commandprompt.com/ppbook/)
 * [Postgres Succinctly](http://www.syncfusion.com/resources/techportal/ebooks/postgres) (PDF, Kindle) *(Just fill the fields with any values)*
+* [Practical PostgreSQL](http://www.commandprompt.com/ppbook/)
 
 
 ###PowerShell