Use this exact prompt:
"You are an expert writer for procurement teams. Produce a 3,000-word whitepaper with these sections and word counts: Executive Summary (300), Background & Problem (700), Procurement Impact (600), Analysis & Evidence (900), Recommendations (300), Implementation Plan (100), Risks & Mitigations (50), Conclusion (50), Bibliography. For every factual claim include an inline citation like [AuthorYYYY] and add numbered bibliography entries in APA: Author. (Year). Title. Publisher. URL. Use only verifiable sources; if none, write 'unsourced'."

If you’ll run this in ChatGPT, see feature notes: Compare ChatGPT and Gemini