Publishers
- Popular Press Ltd. 1
- Porsche Cars 1
- Porter Press International Ltd 2
- Portico D'Abitot Press 1
- Potomac Books, Inc. 2
- Potteries Omnibus Preservation Society 1
- Praeger Publishers 1
- Prancing Tortoise Publications 1
- Prc Publishing 1
- Preface 2
- Prentice Hall International 1
- Prentice-Hall 6
- Prentice-Hall Inc. 3
- Presidio Press 3
- Press Syndicate Of The University Of Cambridge 6
- Prestel 6
- Price, Stern, Sloan 1
- Princeton Architectural Press 1
- Princeton University Press 19
- Prindle, Weber & Schmidt 2
- Printed For The Society By W. Bulmer And Co. 1
- Prion Books 1
- Priory Press Limited 1
- Professional Engineering Publishing 1
- Profile Books 2
- Profile Publications 14
- Progress Publishers 1
- Promak Ltd. 1
- Promotional Reprint Company 1
- Promotional Reprint Company Ltd. 1
- Propylaen 1
- Protea Book House 1
- Ps Publishing 1
- Psi 1
- Pt Freeport Indonesia 1
- Publi-Inter 1
- Publications Division, Ministry Of Information And Broadcasting 1
- Publications Willy Fischer 1
- Publicity Products Limited 3
- Publicity Products Ltd. 1
- Puffin 7
- Puffin Books 29
- Pumpkin Press 1
- Punch 1
- Purnell 44
- Purnell & Sons 3
- Purnell & Sons, Ltd. 7
- Purnell Book Services Limited 2
- Purnell Books 7
- Pushkin Children's Books 1
- Putnam 51
- Putnam & Co. Ltd. 3
- Putnam & Company 1
- Putnam Aeronautical Books 17
- Puzzle Books Ltd. 1
- Pwyllgor Mileniwm Truddyn Millennium Committee 1
- Pyramid Books 1
- Quadrille Publishing 1
- Quality Paperback Book Club 1
- Qualprint 1
- Quartet Books 1
- Queen Anne Press 4
- Queensgate Publications 3
- Quelle & Meyer 1
- Quercus 3
- Quicksilver Communications, Inc. 1
- Quiller Press 4
- Quills Publishing 1
- Quist Publishing Ltd. 1
- Quoin Publishing Ltd 1
- Quota Press, Belfast 1
- Quotes Limited 2
- R. & E. Lenk 1
- R. And L. Peacock 1
- R. Faulder 2
- R. Franklin 1
- R. J. Leach & Co. 1
- R. Jabet And Co. 1
- R. James Bender 2
- R. Jones 1
- R. Schultz & Co. 1
- R. Yorke Clarke And Co. 1
- R.A. Publishing Co. Ltd. 6
- R.A. Sutton 1
- R.G. Low 1
- R.H. Johns 1
- R.H. Johns Limited 2
- R.H. Lloyd 1
- R.H. Porter 1
- R.J. Pope 1
- R.S.V. Publishing Inc. 1
- R.T.S Lutterworth Press 3
- R.T.S. 5
- R.W. Simpson & Co. Ltd. 1
- R&b 1
- Raben & Sjogren 1
- Radiotjanst 2
- Raf. D. Szalatnay 1
- Rafm Co. Inc. 1
- Ragged Bears Limited 2