The best replacement for referencing is citing.

The best alternatives to referencing are rated as following:
★★★★★  citing
★★  criterion referencing
★  referring
★  bibliography
★  referring to
  criteria referencing

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Speaking about referencing, one probably shouldn't forget about footnotes.

Other search terms related to referencing and their ratings are:
★★★★★ footnotes
★ no author harvard
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referencing
citing
criterion referencing