There is only one scientifically proven way of getting abs - by lowering your bodyfat %.
How is this achieved? By expending more energy than you consume I.E. EAT LESS THAN YOU NEED. How much you needs depends on how much you weigh, how tall you are, how old you are, what your bodyfat % currently is, and how active you are. Google "how to calculate maintenance calories" and read as much as you possibly can. When you feel confident to calculate this number, do so and run it by me - I'd be happy to check the numbers for you.
Then, you take this number, and subtract 500 - this gives you the number of calories you need to consume per day to lose fat. You should count calories to achieve this - myfitnesspal.com is a fantastic website to track calories and they have a fantastic iphone and android app that a lot of people use daily. Track calories and eat at a deficit until you have abs. Congrats, it's that simple. It's not easy, but its very very simple. I would recommend a weekly cheat meal to replenish Leptin (hormone) levels - this will help with hunger and satiety.
I can guarantee if you follow my instructions to the letter, you will get "abs".