- PMM Books
- Pal Pubns/Mediatek
- Palgrave
- Palgrave Macmillan
- Parragon Inc
- Patria Editorial
- Paw Prints
- Pearson Education
- Pearson Education Limited
- Penguin Classics
- Penguin Press
- Pennwell Corp
- Penton Media
- Pergamon Journals
- Pergamon Pr
- Peter Lang Pub Inc
- Peter Peregrinus Ltd
- Physica
- Picador
- Plunkett Research Ltd
- Polygon Press
- Portico
- Potomac Books
- Praeger
- Praeger Publishers
- Praxis
- Prentice Hall
- Professional Pubns Inc
- Project Management Inst
- Prompt Pubns
- Pws Pub Co
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