<p>Now I plan to ask for letter of recommendation in 2-3 week, but I'm still not sure that I should send it as an email after the email of asking for LoR, or just bring it in professors' office hour after the email...And I heard that I should bring the envelopes with the address of the schools I want to apply, is that right? And which one is better, send an email or bring it...? And is it enough to ask for LoR in the last week of November-first week of December..? Please I need some advice about asking LoR! (especially in its process..)</p>