Origin of Afshin

Dear Atabek,
Some of the sources mentioned are not scholarly or outdated.
What are the qualifications of these authors relative to Bosworth, Bernard Lewis and Daniel Pipes (who did his work on this topic: D. Pipes. Turks in Early Muslim Service — JTS, 1978, 2, 85—96).  

Note I am talking about the qualification of these:
A)
Rose, Hugh James; Rose, Henry John; Wright, Thomas (1848). New general biographical dictionary, Volume 2. Fellowes. p. 424. http://books.google.com/books?id=f2AMAAAAYAAJ&pg;=PA424. "the whole force of the khalifate was directed, under a Turkish general of great celebrity, named Afshin, to crush this monstrous sect"  

1848?

B)
Hasan, Masudul (1998). History of Islam: Volume 1. Islamic Publications. p. 224. http://books.google.com/books?id=TPsPAQAAIAAJ. "After the failure of some campaigns, Mutasim sent a large force under his Turkish General Haider Afshin to suppress the revolt and capture the Brigand at all costs."  

What is the scholarly qualification?

C)
Chisholm, Hugh (1910). The Encyclopædia britannica: a dictionary of arts, sciences, literature and general information. The Encyclopædia Britannica Company. p. 48. ISBN 0742562964. http://books.google.com/books?id=Sv8tAAAAIAAJ&pg;=PA48. "Motasim made Afshin, a Turkic prince who had distinguished himself already in the days of Mamun, governor of Media, with orders to take the lead of the war against Babak"  

1910 is outdated.  

D)
Glassé, Cyril (2008). The new encyclopedia of Islam. Rowman & Littlefield. p. 80. ISBN 0742562964. http://books.google.com/books?id=D7tu12gt4JYC&pg;=PA80. "the Turkic general Afshin subdued Babak by taking the fortress of Badh in 222/837"  

The person is not a university academic.

Please provide justification on what level these sources are on the same level as Bosworth, Bernard Lewis and specialized article on Turks in early Muslim service.
H. M. Balyuzi , G. Ronald, the University of Michigan. 1976: "Afshin was of princely descent, his ancestors having ruled Transoxania, and he was not a Turk, but an Iranian".

I don't think we need mediation on this issue, but I see no justification for given the same weight for academic sources as non-academic sources.