Publishers
- A & C Black Publishers 1
- A & J Partnership 1
- A Paris 1
- A. & C. Black 25
- A. & C. Black Ltd. 32
- A. & E. Publishers Ltd. 1
- A. & K. Publications 1
- A. Anton & Co 1
- A. Brown & Sons Ltd. 1
- A. Capendu 1
- A. Deichert'Sche 1
- A. Desesserts 1
- A. Dodd 1
- A. Druce 1
- A. Huschke 1
- A. John Ward 1
- A. Macgoun 1
- A. Neumann 1
- A. Stark 1
- A. Walker & Son 1
- A. Wessels Company 1
- A. Wheaton & Co. 1
- A. Wheaton & Co. Ltd. 19
- A. Ziemsen 3
- A.A. Balkema 5
- A.B. Campbell & Co. 1
- A.C. Fifield 1
- A.C. Mcclurg 1
- A.D. Innes & Co. 3
- A.H. & A.W. Reed 4
- A.H. Packer 1
- A.H. Tucker 1
- A.J. Hurley Limited 1
- A.J. Lawrence 1
- A.K. Newman and Co. 3
- A.K. Peters Ltd 1
- A.L. Burt Company 3
- A.R. Harding 1
- A.R. Mowbray & Co. Limited 2
- A.R.Mowbray & Co. Ltd 2
- A.S. Barnes and Company 2
- A.T. Bannister 1
- A.T. Kirk 1
- A.W. Sijthoff 1
- AA 1
- Aappl Artists' and Photographers' press Ltd. 1
- Ab Id Kort 1
- Abacus Press 2
- Abberville Press 1
- Abbeville Press 9
- Abbey Library 1
- Abbeydale Press 1
- ABC 4
- Abel Heywood & Son 1
- Abel Heywood & Son Ltd. 1
- Abelard 5
- Abelard-Schuman 12
- Aberdeen University Press 1
- Abhinav Publications 1
- Abingdon Press 1
- Able Publishing 1
- Abracadazzle 3
- Abraham Wolfgang 1
- Abrams 1
- Abrams Books For Young Readers 3
- Abson Books 2
- Academic Press 45
- Academy Books 2
- Academy Editions 3
- Academy For Rural Devlopment Peshawar 1
- Accademia Nazionale Dei Lincei 1
- Ackermann & Co. 1
- Acorn Press 1
- Ad Hoc Publications 1
- Adam & Charles Black 50
- Adam Hilger Ltd. 4
- Adams & Dart 1
- Addey & Co. 1
- Addison-Wesley 15
- Addison-Wesley Longman 1
- Addison-Wesley Publishing Company 1
- Addison-Wesley Publishing Company Inc. 6
- Adelphi Company 1
- Adlard & Son 1
- Adlard Coles 2
- Adprint 2
- Adprint Limited 3
- Adprint Ltd. 2
- Adrian & Neil Turley 1
- Adrien Sporck 1
- Adventure Publications, Inc 1
- Aeberhard & Partners 1
- Aero Publishers 7
- Aerodata International 3
- Aerofax 4
- Aerospace 6
- Aerospace Publications Pty Limited 1
- Ahmadu Bello University Press 3
- Aidan Ellis Publishing Limited 1
- Aidu(raf) 1