For me, I started doing MLA formats in High School. Instead of just writing the URL as reference, you use it in MLA format, which is more specific. An internal phrase could be, for example, if you're writing about pandas, you got your information from National Geographic.
Family separation was a routine practiced during the Holocaust because the males and females were always separated and thus splitting up families. This is an extreme challenge for a united family because they are unable to see each other ever again.