The difference between a primary source and a secondary source is that a primary source is most likely going to be more reliable because it came from someone or something that was there when it happened.
Charlie Puth’s autobiography would be a primary source because he is the one writing it. If someone else were to write it they wouldn’t know everything which could change the way that it was written.
Chiến tranh Lạnh giai đoạn 1985 tới 1991 bắt đầu với sự nổi lên của Mikhail Gorbachev trở thành lãnh đạo Liên xô. Nó chấm dứt cùng với sự sụp đổ của Liên bang Xô viết năm 1991.
