Cf.
Cf.
Latin abbreviation meaning "compare"
The abbreviation cf. (short for either Latin confer or conferatur, both meaning 'compare')[1] is used in writing to refer the reader to other material to make a comparison with the topic being discussed. Style guides recommend that "cf." be used only to suggest a comparison, and the words "see" or "vide" be used generally to point to a source of information.[2][3]
Look up confer in Wiktionary, the free dictionary.
In Italian, the abbreviation "cfr." is more common than "cf." is.[4]