Is my budgie a male or a female?

well ive had my budgies for around five months... ive tamed them theyre in good shape but I wanna know what my blue budgie's gender is. I told myself to wait a little longer to know my budgie's gender but, its nose hasent changed yet. Its nose is a little brown in the middle and around is white and light blue. I thought it was a female because it has a high chirp voice and is kind of bossy and stuff. according to a book, it says that female budgies are harder to tame and are mean but I dont think so cause my budgie loves me more than my other budgie, hes a male.so yeah, please help me im confused and is it even a desease? ok thanks ♥

At www.budgieplace.com you can easily find out what sex it is. They also have a forum. Sorry, my phone was being difficult when I tried to copy the link.

I think it is female!

I think blue noses is males, brown is females.