admin_print_styles-{$subpage_hook}

See hook in action

See this hook used in plugins:

Select Pluginbuddypress.10.1.0buddypress.10.2.0buddypress.10.3.0buddypress.10.4.0buddypress.10.5.0buddypress.10.6.0buddypress.11.0.0buddypress.11.1.0buddypress.11.2.0buddypress.11.3.2buddypress.11.4.0buddypress.12.0.0buddypress.12.1.1buddypress.12.2.0buddypress.12.3.0buddypress.12.4.0