ของเพื่อนร่วมห้อง
Hello everyone! I would like to invite you to take part in the birthday party. Please be advised that this special occasion will be fun.
ของอาจารย์ที่ปรึกษา
Dear, Advisors
I cordially invite you to take part in the birthday party. The address is enclosed in the invitation. Please RSVP if you are bringing more then one person, Warm regards.
Sincerely.