Parkinson, H. (1932). Scientific investment: A manual for company share and debenture holders. I. Pitman.
Chicago-referens (17:e uppl.)Parkinson, Hargreaves. Scientific Investment: A Manual for Company Share and Debenture Holders. London: I. Pitman, 1932.
MLA-referens (8:e uppl.)Parkinson, Hargreaves. Scientific Investment: A Manual for Company Share and Debenture Holders. I. Pitman, 1932.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.