The encyclopaedia of birds
edited by Christopher M. Perrins and Alex L.A. Middleton
Grolier International, 1993
 Buku Referensi
Encyclopaedia of textiles
edited by P.V. Vidyasagar
Mittal Publications, 2000
 Buku Referensi
Slavonic encyclopaedia
edited by Joseph S. Roucek
Philosophical Library, 1949
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An encyclopaedia of philosophy
general editor, G.H.R. Parkinson; associate editors, T.E. Burke, J.G. Cottingham, M.A. Proudham and J.E. Tiles
Routledge, 1988
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The Encyclopaedia of mammals
edited by David Macdonald
Facts on File, 1993
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