Publisher
- Routledge25
- Rowman & Littlefield Publishers9
- Thomas Nelson7
- Cambridge Scholars Publishing5
- The University of Chicago Press5
- W. W. Norton & Company5
- Amberley Publishing4
- Palgrave Macmillan4
- Pearson4
- W.W. Norton and Company4
- Harper3
- HarperCollins e-books3
- Penguin3
- Penguin Books3
- Wide Eyed Editions3
- Yale University Press3
- Andrews UK Ltd2
- BBC Digital2
- Collins2
- Grupo Nelson2