• If a claim is doubtful but not harmful, use the ^{[citation needed]} template, which will add an inline tag, but remember to go back and remove the claim if no source is produced within a reasonable time.
• If a claim is doubtful and harmful, remove it from the article. You may want to move it to the talk page and ask for a source, unless it is very harmful or absurd, in which case it should not be posted to the talk page either. Use your common sense.
• All unsourced and poorly sourced contentious material about living persons must be removed from articles and talk pages immediately. See Wikipedia:Biographies of living persons and Wikipedia:Libel.

• If a statement can't be verified in the source, use the Failed verification ^{[failed verification]} template.

Examples of references:

"{"{"cite book | last = | first = | authorlink = | title = | publisher = | series = | volume = | edition = | date = | location = | pages = | language = | url = | doi = | id = | isbn = | mr = | zbl = | jfm = "}"}"

The Sun is pretty big,^[1]
but the Moon is not so big.^[2]

References with a name which can be referred to multiple times^[3]

Future instances of same reference: ^[3]

See Wikipedia:Bare URLs for templates showing how to deal with websites as references.

For references with author credit (view source)

{{cite web}}: Empty citation (help) {{cite web}}: Empty citation (help)

For references without author credit (view source)

{{cite web}}: Empty citation (help) {{cite web}}: Empty citation (help)

Full parameter set in horizontal format (view source) {{cite web}}: Empty citation (help)

See

An example of the cite web reference template.^[4]

^[5]

An example of the cite news reference template^[6]

Photos uploading

Template:Non-free use rationale

References