Publishers
- A & C Black Publishers 1
- A & K Publications 1
- A Paris 1
- A. & C. Black 37
- A. & C. Black Ltd. 35
- A. & E. Publishers Ltd. 2
- A. & K. Publications 1
- A. Anton & Co 1
- A. Brown & Sons Limited 1
- A. Brown & Sons Ltd. 1
- A. Deichert'Sche 1
- A. Desesserts 1
- A. Dodd 1
- A. Fullarton & Co 1
- A. Huschke 1
- A. John Ward 1
- A. Macgoun 1
- A. Neumann 1
- A. Southey 1
- A. Speelman & Bro. 1
- A. Stark 1
- A. Walker & Son 1
- A. Webster & Co. 1
- A. Wessels Company 1
- A. Wheaton & Co. Ltd. 5
- A. Ziemsen 3
- A. Zwemmer 1
- A.A. Balkema 5
- A.A. Quin Ltd. 1
- A.C. Fifield 1
- A.C. Mcclurg 1
- A.D. Innes & Co. 2
- A.H. & A.W. Reed 4
- A.H. Payne 1
- A.H. Tucker 1
- A.J. Holman & Company 1
- A.J. Lawrence 1
- A.J. Van Hees 1
- A.K. Newman and Co. 1
- A.K. Peters Ltd 1
- A.L. Burt Company 3
- A.R. Mowbray & Co. Limited 2
- A.R.Mowbray & Co. Ltd 2
- A.S. Barnes and Company 4
- A.T. Bannister 1
- A.T. Kirk 1
- A.W. Sijthoff 1
- AA 2
- Aappl Artists' and Photographers' press Ltd. 1
- Aardvark 1
- Ab Id Kort 1
- Abacus Press 2
- Abbeville Press 6
- Abbey Library 2
- Abbeywood Publishing (vaccines) Ltd 1
- ABC 4
- Abel Heywood & Son 1
- Abel Heywood & Son Ltd. 2
- Abelard 6
- Abelard-Schuman 13
- Abhinav Publications 1
- Abingdon Press 1
- Able Publishing 1
- Abracadazzle 3
- Abraham Wolfgang 1
- Abrams Books For Young Readers 3
- Abson Books 2
- Academic Press 65
- Academy Books 6
- Academy Editions 4
- Academy For Rural Devlopment Peshawar 1
- Accademia Nazionale Dei Lincei 2
- Ackermann & Co. 1
- Acla Editions 1
- Acla/autotechnica 1
- Acorn Press 1
- Ad Hoc Publications 2
- Ad. M.C. Stok 2
- Adam & Charles Black 68
- Adam Gordon 1
- Adam Hilger Ltd. 6
- Adams & Bishop 1
- Adams & Dart 4
- Adams & Oliver Ltd. 1
- Addey & Co. 2
- Addison-Wesley 7
- Addison-Wesley Longman 1
- Addison-Wesley Publishing Company 2
- Addison-Wesley Publishing Company Inc. 11
- Adlard & Son 1
- Adlard Coles 4
- Adlard Coles Nautical 2
- Adnitt & Naunton Ltd. 1
- Adprint 2
- Adprint Limited 4
- Adprint Ltd. 2
- Adrian & Neil Turley 1
- Adventure Publications, Inc 1
- Aeberhard & Partners 1
- Aero Publishers 7