Related Clues:

• Summon - quote
• Refe
• Go to ask eg 9 opinion
• Speak of - refer to
• Refer to for information
• Refer (to indirectly)
• Quote as a source
• Use in a report
• Recognize as a source
• Casually mention, with "to"
• Credit, as a source
• Put in a footnote
• Slap with a fine
• To summon is sound sense
• Make reference to model within old transport company