to mention or speak about something
mencionar o hablar sobre algo (mencionar o hablar sobre algo)
"As I referred to earlier, this data comes from our annual survey."
"Como ya me referí a esto antes, estos datos provienen de nuestra encuesta anual." (como ya **me referí a** esto antes, estos datos provienen de nuestra encuesta anual)
to direct efforts or plans toward achieving something
to take advantage of favorable situations to gain profit
to have formal discussions or negotiations with someone
to switch operations gradually to another system
to mention a topic briefly and politely
to help someone perform to their highest potential