Page title

after switch ^textew

$π$

differe

→

website^[2]

book^[3]

newspaper^[4]

journal^[5]

reference^[6]

use exisiting reference^[7]

group reference^{[group 1]}

sub1

sub2

sub3

sub4

Preformatted

heading

^ reference
^ "yahoo".
^ book title.
^ "koko".
^ "title". {{cite journal}}: Cite journal requires |journal= (help)
^ _reference text link website"yahoo". bookbook title. newspaper"newspaper". $π$ ^{[citation needed]} →
^ reference
^ http://yahoo.com. {{cite web}}: Missing or empty |title= (help)
^ book.
^ "newspaper title".
^ "journal title". {{cite journal}}: Cite journal requires |journal= (help)
^ rrer

section heading

content

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