NetLogo 7.0.0-beta2:

out-<breed>-to out-link-to4.0

out-<breed>-to turtle out-link-to turtle Turtle Command

Reports a directed link from the caller to turtle or an undirected link connecting the two. If no link exists then it reports nobody. If more than one such link exists, reports a random one. You can think of this as "give me a link that I can use to travel from the caller to turtle."

crt 2
ask turtle 0 [
  create-link-to turtle 1
  show out-link-to turtle 1 ;; shows link 0 1
]
ask turtle 1
[
  show out-link-to turtle 0 ;; shows nobody
]

See also: in-link-from link-with

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