I wonder if "10V, 2V" is a typo and actually means "10V, 2A" as in previous posts? If so, question of suitable power amplifier adds to basic Wien bridge dimensioning and magnitude control problem. Other than suggested by previous posts, there's however no reason to implement oscillator and power amplifier in one stage. It's simple and in case of doubt more stable to separate both functions.
Regarding classical incandescent lamp PTC stabilization, it's a possible solution but requiring design skills and availibility of suitable miniature lamps. Today it's more a retro design (in remembrance of Hewlett-Packards first commercial product) than first choice. Nevertheless links above are teaching how to design it if you prefer it for some reason.
Choice of magnitude stabilization method depends also on accuracy and THD requirements which haven't been told yet.