"Encyclopaedias: their history throughout the ages. A bibliographical guide with extensive historical notes to the general encyclopaedias issued throughout the world from 350 B. C. to the present day", Robert Collison, New York-London 1964 : [recenzja]

Studia Źródłoznawcze. Commentationes, Tom 15 (1970) s. 248
Jerzy Strzelczyk , Robert Collison (aut. dzieła rec.)